2 * net-3-driver for the NI5210 card (i82586 Ethernet chip)
4 * This is an extension to the Linux operating system, and is covered by the
5 * same GNU General Public License that covers that work.
7 * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
8 * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
9 * [feel free to mail ....]
11 * when using as module: (no autoprobing!)
13 * insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000
15 * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!.
17 * If you find a bug, please report me:
18 * The kernel panic output and any kmsg from the ni52 driver
19 * the ni5210-driver-version and the linux-kernel version
20 * how many shared memory (memsize) on the netcard,
21 * bootprom: yes/no, base_addr, mem_start
22 * maybe the ni5210-card revision and the i82586 version
24 * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340
25 * mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000,
26 * 0xd8000,0xcc000,0xce000,0xda000,0xdc000
29 * skeleton.c from Donald Becker
31 * I have also done a look in the following sources: (mail me if you need them)
32 * crynwr-packet-driver by Russ Nelson
33 * Garret A. Wollman's (fourth) i82586-driver for BSD
34 * (before getting an i82596 (yes 596 not 586) manual, the existing drivers
35 * helped me a lot to understand this tricky chip.)
38 * The internal sysbus seems to be slow. So we often lose packets because of
39 * overruns while receiving from a fast remote host.
40 * This can slow down TCP connections. Maybe the newer ni5210 cards are
41 * better. My experience is, that if a machine sends with more than about
42 * 500-600K/s the fifo/sysbus overflows.
45 * On fast networks, it's a (very) good idea to have 16K shared memory. With
46 * 8K, we can store only 4 receive frames, so it can (easily) happen that a
47 * remote machine 'overruns' our system.
49 * Known i82586/card problems (I'm sure, there are many more!):
50 * Running the NOP-mode, the i82586 sometimes seems to forget to report
51 * every xmit-interrupt until we restart the CU.
52 * Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit
53 * in the RBD-Struct which indicates an end of the RBD queue.
54 * Instead, the RU fetches another (randomly selected and
55 * usually used) RBD and begins to fill it. (Maybe, this happens only if
56 * the last buffer from the previous RFD fits exact into the queue and
57 * the next RFD can't fetch an initial RBD. Anyone knows more? )
59 * results from ftp performance tests with Linux 1.2.5
60 * send and receive about 350-400 KByte/s (peak up to 460 kbytes/s)
61 * sending in NOP-mode: peak performance up to 530K/s (but better don't
66 * 29.Sept.96: virt_to_bus changes for new memory scheme
67 * 19.Feb.96: more Mcast changes, module support (MH)
69 * 18.Nov.95: Mcast changes (AC).
71 * 23.April.95: fixed(?) receiving problems by configuring a RFD more
72 * than the number of RBD's. Can maybe cause other problems.
73 * 18.April.95: Added MODULE support (MH)
74 * 17.April.95: MC related changes in init586() and set_multicast_list().
75 * removed use of 'jiffies' in init586() (MH)
77 * 19.Sep.94: Added Multicast support (not tested yet) (MH)
79 * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.
80 * Now, every RFD has exact one RBD. (MH)
82 * 14.Sep.94: added promiscuous mode, a few cleanups (MH)
84 * 19.Aug.94: changed request_irq() parameter (MH)
86 * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
88 * 19.July.94: lotsa cleanups .. (MH)
90 * 17.July.94: some patches ... verified to run with 1.1.29 (MH)
92 * 4.July.94: patches for Linux 1.1.24 (MH)
94 * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
96 * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff,
99 * < 30.Sep.93: first versions
102 static int debuglevel
; /* debug-printk 0: off 1: a few 2: more */
103 static int automatic_resume
; /* experimental .. better should be zero */
104 static int rfdadd
; /* rfdadd=1 may be better for 8K MEM cards */
105 static int fifo
= 0x8; /* don't change */
107 #include <linux/module.h>
108 #include <linux/kernel.h>
109 #include <linux/string.h>
110 #include <linux/errno.h>
111 #include <linux/ioport.h>
112 #include <linux/slab.h>
113 #include <linux/interrupt.h>
114 #include <linux/delay.h>
115 #include <linux/init.h>
116 #include <linux/bitops.h>
119 #include <linux/netdevice.h>
120 #include <linux/etherdevice.h>
121 #include <linux/skbuff.h>
125 #define DRV_NAME "ni52"
127 #define DEBUG /* debug on */
128 #define SYSBUSVAL 1 /* 8 Bit */
130 #define ni_attn586() { outb(0, dev->base_addr + NI52_ATTENTION); }
131 #define ni_reset586() { outb(0, dev->base_addr + NI52_RESET); }
132 #define ni_disint() { outb(0, dev->base_addr + NI52_INTDIS); }
133 #define ni_enaint() { outb(0, dev->base_addr + NI52_INTENA); }
135 #define make32(ptr16) ((void __iomem *)(p->memtop + (short) (ptr16)))
136 #define make24(ptr32) ((char __iomem *)(ptr32)) - p->base
137 #define make16(ptr32) ((unsigned short) ((char __iomem *)(ptr32)\
140 /******************* how to calculate the buffers *****************************
142 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
143 * --------------- in a different (more stable?) mode. Only in this mode it's
144 * possible to configure the driver with 'NO_NOPCOMMANDS'
146 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
147 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
148 sizeof(rfd) = 24; sizeof(rbd) = 12;
149 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
152 * if you don't know the driver, better do not change these values: */
154 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
155 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
156 #define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */
157 #define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */
158 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
159 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
161 /**************************************************************************/
164 #define NI52_TOTAL_SIZE 16
165 #define NI52_ADDR0 0x02
166 #define NI52_ADDR1 0x07
167 #define NI52_ADDR2 0x01
169 static int ni52_probe1(struct net_device
*dev
, int ioaddr
);
170 static irqreturn_t
ni52_interrupt(int irq
, void *dev_id
);
171 static int ni52_open(struct net_device
*dev
);
172 static int ni52_close(struct net_device
*dev
);
173 static int ni52_send_packet(struct sk_buff
*, struct net_device
*);
174 static struct net_device_stats
*ni52_get_stats(struct net_device
*dev
);
175 static void set_multicast_list(struct net_device
*dev
);
176 static void ni52_timeout(struct net_device
*dev
);
178 /* helper-functions */
179 static int init586(struct net_device
*dev
);
180 static int check586(struct net_device
*dev
, unsigned size
);
181 static void alloc586(struct net_device
*dev
);
182 static void startrecv586(struct net_device
*dev
);
183 static void __iomem
*alloc_rfa(struct net_device
*dev
, void __iomem
*ptr
);
184 static void ni52_rcv_int(struct net_device
*dev
);
185 static void ni52_xmt_int(struct net_device
*dev
);
186 static void ni52_rnr_int(struct net_device
*dev
);
189 struct net_device_stats stats
;
191 char __iomem
*mapped
;
192 char __iomem
*memtop
;
195 struct rfd_struct __iomem
*rfd_last
, *rfd_top
, *rfd_first
;
196 struct scp_struct __iomem
*scp
;
197 struct iscp_struct __iomem
*iscp
;
198 struct scb_struct __iomem
*scb
;
199 struct tbd_struct __iomem
*xmit_buffs
[NUM_XMIT_BUFFS
];
200 #if (NUM_XMIT_BUFFS == 1)
201 struct transmit_cmd_struct __iomem
*xmit_cmds
[2];
202 struct nop_cmd_struct __iomem
*nop_cmds
[2];
204 struct transmit_cmd_struct __iomem
*xmit_cmds
[NUM_XMIT_BUFFS
];
205 struct nop_cmd_struct __iomem
*nop_cmds
[NUM_XMIT_BUFFS
];
207 int nop_point
, num_recv_buffs
;
208 char __iomem
*xmit_cbuffs
[NUM_XMIT_BUFFS
];
209 int xmit_count
, xmit_last
;
212 /* wait for command with timeout: */
213 static void wait_for_scb_cmd(struct net_device
*dev
)
215 struct priv
*p
= netdev_priv(dev
);
217 for (i
= 0; i
< 16384; i
++) {
218 if (readb(&p
->scb
->cmd_cuc
) == 0)
222 printk(KERN_ERR
"%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
223 dev
->name
, readb(&p
->scb
->cmd_cuc
), readb(&p
->scb
->cus
));
232 static void wait_for_scb_cmd_ruc(struct net_device
*dev
)
234 struct priv
*p
= netdev_priv(dev
);
236 for (i
= 0; i
< 16384; i
++) {
237 if (readb(&p
->scb
->cmd_ruc
) == 0)
241 printk(KERN_ERR
"%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
242 dev
->name
, readb(&p
->scb
->cmd_ruc
),
243 readb(&p
->scb
->rus
));
252 static void wait_for_stat_compl(void __iomem
*p
)
254 struct nop_cmd_struct __iomem
*addr
= p
;
256 for (i
= 0; i
< 32767; i
++) {
257 if (readw(&((addr
)->cmd_status
)) & STAT_COMPL
)
263 /**********************************************
266 static int ni52_close(struct net_device
*dev
)
268 free_irq(dev
->irq
, dev
);
269 ni_reset586(); /* the hard way to stop the receiver */
270 netif_stop_queue(dev
);
274 /**********************************************
277 static int ni52_open(struct net_device
*dev
)
287 ret
= request_irq(dev
->irq
, &ni52_interrupt
, 0, dev
->name
, dev
);
292 netif_start_queue(dev
);
293 return 0; /* most done by init */
296 static int check_iscp(struct net_device
*dev
, void __iomem
*addr
)
298 struct iscp_struct __iomem
*iscp
= addr
;
299 struct priv
*p
= netdev_priv(dev
);
300 memset_io(iscp
, 0, sizeof(struct iscp_struct
));
302 writel(make24(iscp
), &p
->scp
->iscp
);
303 writeb(1, &iscp
->busy
);
307 mdelay(32); /* wait a while... */
308 /* i82586 clears 'busy' after successful init */
309 if (readb(&iscp
->busy
))
314 /**********************************************
315 * Check to see if there's an 82586 out there.
317 static int check586(struct net_device
*dev
, unsigned size
)
319 struct priv
*p
= netdev_priv(dev
);
322 p
->mapped
= ioremap(dev
->mem_start
, size
);
326 p
->base
= p
->mapped
+ size
- 0x01000000;
327 p
->memtop
= p
->mapped
+ size
;
328 p
->scp
= (struct scp_struct __iomem
*)(p
->base
+ SCP_DEFAULT_ADDRESS
);
329 p
->scb
= (struct scb_struct __iomem
*) p
->mapped
;
330 p
->iscp
= (struct iscp_struct __iomem
*)p
->scp
- 1;
331 memset_io(p
->scp
, 0, sizeof(struct scp_struct
));
332 for (i
= 0; i
< sizeof(struct scp_struct
); i
++)
333 /* memory was writeable? */
334 if (readb((char __iomem
*)p
->scp
+ i
))
336 writeb(SYSBUSVAL
, &p
->scp
->sysbus
); /* 1 = 8Bit-Bus, 0 = 16 Bit */
337 if (readb(&p
->scp
->sysbus
) != SYSBUSVAL
)
340 if (!check_iscp(dev
, p
->mapped
))
342 if (!check_iscp(dev
, p
->iscp
))
350 /******************************************************************
351 * set iscp at the right place, called by ni52_probe1 and open586.
353 static void alloc586(struct net_device
*dev
)
355 struct priv
*p
= netdev_priv(dev
);
360 memset_io(p
->iscp
, 0, sizeof(struct iscp_struct
));
361 memset_io(p
->scp
, 0, sizeof(struct scp_struct
));
363 writel(make24(p
->iscp
), &p
->scp
->iscp
);
364 writeb(SYSBUSVAL
, &p
->scp
->sysbus
);
365 writew(make16(p
->scb
), &p
->iscp
->scb_offset
);
367 writeb(1, &p
->iscp
->busy
);
373 if (readb(&p
->iscp
->busy
))
374 printk(KERN_ERR
"%s: Init-Problems (alloc).\n", dev
->name
);
378 memset_io(p
->scb
, 0, sizeof(struct scb_struct
));
381 /* set: io,irq,memstart,memend or set it when calling insmod */
383 static int io
= 0x300;
384 static long memstart
; /* e.g 0xd0000 */
385 static long memend
; /* e.g 0xd4000 */
387 /**********************************************
388 * probe the ni5210-card
390 struct net_device
* __init
ni52_probe(int unit
)
392 struct net_device
*dev
= alloc_etherdev(sizeof(struct priv
));
393 static int ports
[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
399 return ERR_PTR(-ENOMEM
);
401 p
= netdev_priv(dev
);
404 sprintf(dev
->name
, "eth%d", unit
);
405 netdev_boot_setup_check(dev
);
408 memstart
= dev
->mem_start
;
409 memend
= dev
->mem_end
;
412 if (io
> 0x1ff) { /* Check a single specified location. */
413 err
= ni52_probe1(dev
, io
);
414 } else if (io
> 0) { /* Don't probe at all. */
417 for (port
= ports
; *port
&& ni52_probe1(dev
, *port
) ; port
++)
422 for (io
= 0x200; io
< 0x400 && ni52_probe1(dev
, io
); io
+= 8)
432 err
= register_netdev(dev
);
438 release_region(dev
->base_addr
, NI52_TOTAL_SIZE
);
444 static const struct net_device_ops ni52_netdev_ops
= {
445 .ndo_open
= ni52_open
,
446 .ndo_stop
= ni52_close
,
447 .ndo_get_stats
= ni52_get_stats
,
448 .ndo_tx_timeout
= ni52_timeout
,
449 .ndo_start_xmit
= ni52_send_packet
,
450 .ndo_set_multicast_list
= set_multicast_list
,
451 .ndo_change_mtu
= eth_change_mtu
,
452 .ndo_set_mac_address
= eth_mac_addr
,
453 .ndo_validate_addr
= eth_validate_addr
,
456 static int __init
ni52_probe1(struct net_device
*dev
, int ioaddr
)
459 struct priv
*priv
= netdev_priv(dev
);
461 dev
->base_addr
= ioaddr
;
463 dev
->mem_start
= memstart
;
464 dev
->mem_end
= memend
;
466 spin_lock_init(&priv
->spinlock
);
468 if (!request_region(ioaddr
, NI52_TOTAL_SIZE
, DRV_NAME
))
471 if (!(inb(ioaddr
+NI52_MAGIC1
) == NI52_MAGICVAL1
) ||
472 !(inb(ioaddr
+NI52_MAGIC2
) == NI52_MAGICVAL2
)) {
477 for (i
= 0; i
< ETH_ALEN
; i
++)
478 dev
->dev_addr
[i
] = inb(dev
->base_addr
+i
);
480 if (dev
->dev_addr
[0] != NI52_ADDR0
|| dev
->dev_addr
[1] != NI52_ADDR1
481 || dev
->dev_addr
[2] != NI52_ADDR2
) {
486 printk(KERN_INFO
"%s: NI5210 found at %#3lx, ",
487 dev
->name
, dev
->base_addr
);
490 * check (or search) IO-Memory, 8K and 16K
493 size
= dev
->mem_end
- dev
->mem_start
;
494 if (size
!= 0x2000 && size
!= 0x4000) {
496 printk(KERN_ERR
"%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev
->name
, size
);
500 if (!check586(dev
, size
)) {
501 printk(KERN_ERR
"?memcheck, Can't find memory at 0x%lx with size %d!\n", dev
->mem_start
, size
);
506 if (dev
->mem_start
!= 0) {
507 /* no auto-mem-probe */
508 size
= 0x4000; /* check for 16K mem */
509 if (!check586(dev
, size
)) {
510 size
= 0x2000; /* check for 8K mem */
511 if (!check586(dev
, size
)) {
512 printk(KERN_ERR
"?memprobe, Can't find memory at 0x%lx!\n", dev
->mem_start
);
518 static const unsigned long memaddrs
[] = {
519 0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
520 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
524 printk(KERN_ERR
"?memprobe, Can't find io-memory!\n");
528 dev
->mem_start
= memaddrs
[i
];
529 size
= 0x2000; /* check for 8K mem */
530 if (check586(dev
, size
))
533 size
= 0x4000; /* check for 16K mem */
534 if (check586(dev
, size
))
539 /* set mem_end showed by 'ifconfig' */
540 dev
->mem_end
= dev
->mem_start
+ size
;
545 /* set number of receive-buffs according to memsize */
547 priv
->num_recv_buffs
= NUM_RECV_BUFFS_8
;
549 priv
->num_recv_buffs
= NUM_RECV_BUFFS_16
;
551 printk(KERN_DEBUG
"Memaddr: 0x%lx, Memsize: %d, ",
552 dev
->mem_start
, size
);
555 unsigned long irq_mask
;
557 irq_mask
= probe_irq_on();
562 dev
->irq
= probe_irq_off(irq_mask
);
564 printk("?autoirq, Failed to detect IRQ line!\n");
566 iounmap(priv
->mapped
);
569 printk("IRQ %d (autodetected).\n", dev
->irq
);
573 printk("IRQ %d (assigned and not checked!).\n", dev
->irq
);
576 dev
->netdev_ops
= &ni52_netdev_ops
;
577 dev
->watchdog_timeo
= HZ
/20;
581 release_region(ioaddr
, NI52_TOTAL_SIZE
);
585 /**********************************************
586 * init the chip (ni52-interrupt should be disabled?!)
587 * needs a correct 'allocated' memory
590 static int init586(struct net_device
*dev
)
594 struct priv
*p
= netdev_priv(dev
);
595 struct configure_cmd_struct __iomem
*cfg_cmd
;
596 struct iasetup_cmd_struct __iomem
*ias_cmd
;
597 struct tdr_cmd_struct __iomem
*tdr_cmd
;
598 struct mcsetup_cmd_struct __iomem
*mc_cmd
;
599 struct dev_mc_list
*dmi
= dev
->mc_list
;
600 int num_addrs
= dev
->mc_count
;
604 cfg_cmd
= ptr
; /* configure-command */
605 writew(0, &cfg_cmd
->cmd_status
);
606 writew(CMD_CONFIGURE
| CMD_LAST
, &cfg_cmd
->cmd_cmd
);
607 writew(0xFFFF, &cfg_cmd
->cmd_link
);
609 /* number of cfg bytes */
610 writeb(0x0a, &cfg_cmd
->byte_cnt
);
611 /* fifo-limit (8=tx:32/rx:64) */
612 writeb(fifo
, &cfg_cmd
->fifo
);
613 /* hold or discard bad recv frames (bit 7) */
614 writeb(0x40, &cfg_cmd
->sav_bf
);
615 /* addr_len |!src_insert |pre-len |loopback */
616 writeb(0x2e, &cfg_cmd
->adr_len
);
617 writeb(0x00, &cfg_cmd
->priority
);
618 writeb(0x60, &cfg_cmd
->ifs
);;
619 writeb(0x00, &cfg_cmd
->time_low
);
620 writeb(0xf2, &cfg_cmd
->time_high
);
621 writeb(0x00, &cfg_cmd
->promisc
);;
622 if (dev
->flags
& IFF_ALLMULTI
) {
623 int len
= ((char __iomem
*)p
->iscp
- (char __iomem
*)ptr
- 8) / 6;
624 if (num_addrs
> len
) {
625 printk(KERN_ERR
"%s: switching to promisc. mode\n",
627 writeb(0x01, &cfg_cmd
->promisc
);
630 if (dev
->flags
& IFF_PROMISC
)
631 writeb(0x01, &cfg_cmd
->promisc
);
632 writeb(0x00, &cfg_cmd
->carr_coll
);
633 writew(make16(cfg_cmd
), &p
->scb
->cbl_offset
);
634 writeb(0, &p
->scb
->cmd_ruc
);
636 writeb(CUC_START
, &p
->scb
->cmd_cuc
); /* cmd.-unit start */
639 wait_for_stat_compl(cfg_cmd
);
641 if ((readw(&cfg_cmd
->cmd_status
) & (STAT_OK
|STAT_COMPL
)) !=
642 (STAT_COMPL
|STAT_OK
)) {
643 printk(KERN_ERR
"%s: configure command failed: %x\n",
644 dev
->name
, readw(&cfg_cmd
->cmd_status
));
649 * individual address setup
654 writew(0, &ias_cmd
->cmd_status
);
655 writew(CMD_IASETUP
| CMD_LAST
, &ias_cmd
->cmd_cmd
);
656 writew(0xffff, &ias_cmd
->cmd_link
);
658 memcpy_toio(&ias_cmd
->iaddr
, (char *)dev
->dev_addr
, ETH_ALEN
);
660 writew(make16(ias_cmd
), &p
->scb
->cbl_offset
);
662 writeb(CUC_START
, &p
->scb
->cmd_cuc
); /* cmd.-unit start */
665 wait_for_stat_compl(ias_cmd
);
667 if ((readw(&ias_cmd
->cmd_status
) & (STAT_OK
|STAT_COMPL
)) !=
668 (STAT_OK
|STAT_COMPL
)) {
669 printk(KERN_ERR
"%s (ni52): individual address setup command failed: %04x\n", dev
->name
, readw(&ias_cmd
->cmd_status
));
674 * TDR, wire check .. e.g. no resistor e.t.c
679 writew(0, &tdr_cmd
->cmd_status
);
680 writew(CMD_TDR
| CMD_LAST
, &tdr_cmd
->cmd_cmd
);
681 writew(0xffff, &tdr_cmd
->cmd_link
);
682 writew(0, &tdr_cmd
->status
);
684 writew(make16(tdr_cmd
), &p
->scb
->cbl_offset
);
685 writeb(CUC_START
, &p
->scb
->cmd_cuc
); /* cmd.-unit start */
688 wait_for_stat_compl(tdr_cmd
);
690 if (!(readw(&tdr_cmd
->cmd_status
) & STAT_COMPL
))
691 printk(KERN_ERR
"%s: Problems while running the TDR.\n",
695 result
= readw(&tdr_cmd
->status
);
696 writeb(readb(&p
->scb
->cus
) & STAT_MASK
, &p
->scb
->cmd_cuc
);
697 ni_attn586(); /* ack the interrupts */
699 if (result
& TDR_LNK_OK
)
701 else if (result
& TDR_XCVR_PRB
)
702 printk(KERN_ERR
"%s: TDR: Transceiver problem. Check the cable(s)!\n",
704 else if (result
& TDR_ET_OPN
)
705 printk(KERN_ERR
"%s: TDR: No correct termination %d clocks away.\n",
706 dev
->name
, result
& TDR_TIMEMASK
);
707 else if (result
& TDR_ET_SRT
) {
708 /* time == 0 -> strange :-) */
709 if (result
& TDR_TIMEMASK
)
710 printk(KERN_ERR
"%s: TDR: Detected a short circuit %d clocks away.\n",
711 dev
->name
, result
& TDR_TIMEMASK
);
713 printk(KERN_ERR
"%s: TDR: Unknown status %04x\n",
720 if (num_addrs
&& !(dev
->flags
& IFF_PROMISC
)) {
722 writew(0, &mc_cmd
->cmd_status
);
723 writew(CMD_MCSETUP
| CMD_LAST
, &mc_cmd
->cmd_cmd
);
724 writew(0xffff, &mc_cmd
->cmd_link
);
725 writew(num_addrs
* 6, &mc_cmd
->mc_cnt
);
727 for (i
= 0; i
< num_addrs
; i
++, dmi
= dmi
->next
)
728 memcpy_toio(mc_cmd
->mc_list
[i
],
731 writew(make16(mc_cmd
), &p
->scb
->cbl_offset
);
732 writeb(CUC_START
, &p
->scb
->cmd_cuc
);
735 wait_for_stat_compl(mc_cmd
);
737 if ((readw(&mc_cmd
->cmd_status
) & (STAT_COMPL
|STAT_OK
))
738 != (STAT_COMPL
|STAT_OK
))
739 printk(KERN_ERR
"%s: Can't apply multicast-address-list.\n", dev
->name
);
743 * alloc nop/xmit-cmds
745 #if (NUM_XMIT_BUFFS == 1)
746 for (i
= 0; i
< 2; i
++) {
747 p
->nop_cmds
[i
] = ptr
;
748 writew(CMD_NOP
, &p
->nop_cmds
[i
]->cmd_cmd
);
749 writew(0, &p
->nop_cmds
[i
]->cmd_status
);
750 writew(make16(p
->nop_cmds
[i
]), &p
->nop_cmds
[i
]->cmd_link
);
751 ptr
= ptr
+ sizeof(struct nop_cmd_struct
);
754 for (i
= 0; i
< NUM_XMIT_BUFFS
; i
++) {
755 p
->nop_cmds
[i
] = ptr
;
756 writew(CMD_NOP
, &p
->nop_cmds
[i
]->cmd_cmd
);
757 writew(0, &p
->nop_cmds
[i
]->cmd_status
);
758 writew(make16(p
->nop_cmds
[i
]), &p
->nop_cmds
[i
]->cmd_link
);
759 ptr
= ptr
+ sizeof(struct nop_cmd_struct
);
763 ptr
= alloc_rfa(dev
, ptr
); /* init receive-frame-area */
766 * alloc xmit-buffs / init xmit_cmds
768 for (i
= 0; i
< NUM_XMIT_BUFFS
; i
++) {
769 /* Transmit cmd/buff 0 */
770 p
->xmit_cmds
[i
] = ptr
;
771 ptr
= ptr
+ sizeof(struct transmit_cmd_struct
);
772 p
->xmit_cbuffs
[i
] = ptr
; /* char-buffs */
773 ptr
= ptr
+ XMIT_BUFF_SIZE
;
774 p
->xmit_buffs
[i
] = ptr
; /* TBD */
775 ptr
= ptr
+ sizeof(struct tbd_struct
);
776 if ((void __iomem
*)ptr
> (void __iomem
*)p
->iscp
) {
777 printk(KERN_ERR
"%s: not enough shared-mem for your configuration!\n",
781 memset_io(p
->xmit_cmds
[i
], 0,
782 sizeof(struct transmit_cmd_struct
));
783 memset_io(p
->xmit_buffs
[i
], 0,
784 sizeof(struct tbd_struct
));
785 writew(make16(p
->nop_cmds
[(i
+1)%NUM_XMIT_BUFFS
]),
786 &p
->xmit_cmds
[i
]->cmd_link
);
787 writew(STAT_COMPL
, &p
->xmit_cmds
[i
]->cmd_status
);
788 writew(CMD_XMIT
|CMD_INT
, &p
->xmit_cmds
[i
]->cmd_cmd
);
789 writew(make16(p
->xmit_buffs
[i
]), &p
->xmit_cmds
[i
]->tbd_offset
);
790 writew(0xffff, &p
->xmit_buffs
[i
]->next
);
791 writel(make24(p
->xmit_cbuffs
[i
]), &p
->xmit_buffs
[i
]->buffer
);
796 #ifndef NO_NOPCOMMANDS
801 * 'start transmitter'
803 #ifndef NO_NOPCOMMANDS
804 writew(make16(p
->nop_cmds
[0]), &p
->scb
->cbl_offset
);
805 writeb(CUC_START
, &p
->scb
->cmd_cuc
);
807 wait_for_scb_cmd(dev
);
809 writew(make16(p
->xmit_cmds
[0]), &p
->xmit_cmds
[0]->cmd_link
);
810 writew(CMD_XMIT
| CMD_SUSPEND
| CMD_INT
, &p
->xmit_cmds
[0]->cmd_cmd
);
816 writeb(readb(&p
->scb
->cus
) & STAT_MASK
, &p
->scb
->cmd_cuc
);
825 /******************************************************
826 * This is a helper routine for ni52_rnr_int() and init586().
827 * It sets up the Receive Frame Area (RFA).
830 static void __iomem
*alloc_rfa(struct net_device
*dev
, void __iomem
*ptr
)
832 struct rfd_struct __iomem
*rfd
= ptr
;
833 struct rbd_struct __iomem
*rbd
;
835 struct priv
*p
= netdev_priv(dev
);
838 sizeof(struct rfd_struct
) * (p
->num_recv_buffs
+ rfdadd
));
841 for (i
= 0; i
< (p
->num_recv_buffs
+ rfdadd
); i
++) {
842 writew(make16(rfd
+ (i
+1) % (p
->num_recv_buffs
+rfdadd
)),
844 writew(0xffff, &rfd
[i
].rbd_offset
);
847 writeb(RFD_SUSP
, &rfd
[p
->num_recv_buffs
-1+rfdadd
].last
);
849 ptr
= rfd
+ (p
->num_recv_buffs
+ rfdadd
);
852 ptr
= rbd
+ p
->num_recv_buffs
;
854 /* clr descriptors */
855 memset_io(rbd
, 0, sizeof(struct rbd_struct
) * (p
->num_recv_buffs
));
857 for (i
= 0; i
< p
->num_recv_buffs
; i
++) {
858 writew(make16(rbd
+ (i
+1) % p
->num_recv_buffs
), &rbd
[i
].next
);
859 writew(RECV_BUFF_SIZE
, &rbd
[i
].size
);
860 writel(make24(ptr
), &rbd
[i
].buffer
);
861 ptr
= ptr
+ RECV_BUFF_SIZE
;
863 p
->rfd_top
= p
->rfd_first
;
864 p
->rfd_last
= p
->rfd_first
+ (p
->num_recv_buffs
- 1 + rfdadd
);
866 writew(make16(p
->rfd_first
), &p
->scb
->rfa_offset
);
867 writew(make16(rbd
), &p
->rfd_first
->rbd_offset
);
873 /**************************************************
874 * Interrupt Handler ...
877 static irqreturn_t
ni52_interrupt(int irq
, void *dev_id
)
879 struct net_device
*dev
= dev_id
;
884 p
= netdev_priv(dev
);
889 spin_lock(&p
->spinlock
);
891 wait_for_scb_cmd(dev
); /* wait for last command */
893 while ((stat
= readb(&p
->scb
->cus
) & STAT_MASK
)) {
894 writeb(stat
, &p
->scb
->cmd_cuc
);
897 if (stat
& STAT_FR
) /* received a frame */
900 if (stat
& STAT_RNR
) { /* RU went 'not ready' */
902 if (readb(&p
->scb
->rus
) & RU_SUSPEND
) {
903 /* special case: RU_SUSPEND */
904 wait_for_scb_cmd(dev
);
905 writeb(RUC_RESUME
, &p
->scb
->cmd_ruc
);
907 wait_for_scb_cmd_ruc(dev
);
909 printk(KERN_ERR
"%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
910 dev
->name
, stat
, readb(&p
->scb
->rus
));
915 /* Command with I-bit set complete */
919 #ifndef NO_NOPCOMMANDS
920 if (stat
& STAT_CNA
) { /* CU went 'not ready' */
921 if (netif_running(dev
))
922 printk(KERN_ERR
"%s: oops! CU has left active state. stat: %04x/%02x.\n",
923 dev
->name
, stat
, readb(&p
->scb
->cus
));
930 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
931 wait_for_scb_cmd(dev
);
932 if (readb(&p
->scb
->cmd_cuc
)) { /* timed out? */
933 printk(KERN_ERR
"%s: Acknowledge timed out.\n",
939 spin_unlock(&p
->spinlock
);
946 /*******************************************************
950 static void ni52_rcv_int(struct net_device
*dev
)
953 unsigned short totlen
;
955 struct rbd_struct __iomem
*rbd
;
956 struct priv
*p
= netdev_priv(dev
);
961 for (; (status
= readb(&p
->rfd_top
->stat_high
)) & RFD_COMPL
;) {
962 rbd
= make32(readw(&p
->rfd_top
->rbd_offset
));
963 if (status
& RFD_OK
) { /* frame received without error? */
964 totlen
= readw(&rbd
->status
);
965 if (totlen
& RBD_LAST
) {
966 /* the first and the last buffer? */
967 totlen
&= RBD_MASK
; /* length of this frame */
968 writew(0x00, &rbd
->status
);
969 skb
= (struct sk_buff
*)dev_alloc_skb(totlen
+2);
972 skb_put(skb
, totlen
);
973 memcpy_fromio(skb
->data
, p
->base
+ readl(&rbd
->buffer
), totlen
);
974 skb
->protocol
= eth_type_trans(skb
, dev
);
976 p
->stats
.rx_packets
++;
977 p
->stats
.rx_bytes
+= totlen
;
979 p
->stats
.rx_dropped
++;
982 /* free all RBD's until RBD_LAST is set */
984 while (!((rstat
= readw(&rbd
->status
)) & RBD_LAST
)) {
985 totlen
+= rstat
& RBD_MASK
;
987 printk(KERN_ERR
"%s: Whoops .. no end mark in RBD list\n", dev
->name
);
990 writew(0, &rbd
->status
);
991 rbd
= make32(readw(&rbd
->next
));
993 totlen
+= rstat
& RBD_MASK
;
994 writew(0, &rbd
->status
);
995 printk(KERN_ERR
"%s: received oversized frame! length: %d\n",
997 p
->stats
.rx_dropped
++;
999 } else {/* frame !(ok), only with 'save-bad-frames' */
1000 printk(KERN_ERR
"%s: oops! rfd-error-status: %04x\n",
1002 p
->stats
.rx_errors
++;
1004 writeb(0, &p
->rfd_top
->stat_high
);
1005 writeb(RFD_SUSP
, &p
->rfd_top
->last
); /* maybe exchange by RFD_LAST */
1006 writew(0xffff, &p
->rfd_top
->rbd_offset
);
1007 writeb(0, &p
->rfd_last
->last
); /* delete RFD_SUSP */
1008 p
->rfd_last
= p
->rfd_top
;
1009 p
->rfd_top
= make32(readw(&p
->rfd_top
->next
)); /* step to next RFD */
1010 writew(make16(p
->rfd_top
), &p
->scb
->rfa_offset
);
1013 printk("%d", cnt
++);
1016 if (automatic_resume
) {
1017 wait_for_scb_cmd(dev
);
1018 writeb(RUC_RESUME
, &p
->scb
->cmd_ruc
);
1020 wait_for_scb_cmd_ruc(dev
);
1026 for (i
= 0; i
< 1024; i
++) {
1027 if (p
->rfd_top
->status
)
1031 printk(KERN_ERR
"%s: RU hasn't fetched next RFD (not busy/complete)\n", dev
->name
);
1039 /**********************************************************
1040 * handle 'Receiver went not ready'.
1043 static void ni52_rnr_int(struct net_device
*dev
)
1045 struct priv
*p
= netdev_priv(dev
);
1047 p
->stats
.rx_errors
++;
1049 wait_for_scb_cmd(dev
); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1050 writeb(RUC_ABORT
, &p
->scb
->cmd_ruc
); /* usually the RU is in the 'no resource'-state .. abort it now. */
1052 wait_for_scb_cmd_ruc(dev
); /* wait for accept cmd. */
1054 alloc_rfa(dev
, p
->rfd_first
);
1055 /* maybe add a check here, before restarting the RU */
1056 startrecv586(dev
); /* restart RU */
1058 printk(KERN_ERR
"%s: Receive-Unit restarted. Status: %04x\n",
1059 dev
->name
, readb(&p
->scb
->rus
));
1063 /**********************************************************
1064 * handle xmit - interrupt
1067 static void ni52_xmt_int(struct net_device
*dev
)
1070 struct priv
*p
= netdev_priv(dev
);
1075 status
= readw(&p
->xmit_cmds
[p
->xmit_last
]->cmd_status
);
1076 if (!(status
& STAT_COMPL
))
1077 printk(KERN_ERR
"%s: strange .. xmit-int without a 'COMPLETE'\n", dev
->name
);
1079 if (status
& STAT_OK
) {
1080 p
->stats
.tx_packets
++;
1081 p
->stats
.collisions
+= (status
& TCMD_MAXCOLLMASK
);
1083 p
->stats
.tx_errors
++;
1084 if (status
& TCMD_LATECOLL
) {
1085 printk(KERN_ERR
"%s: late collision detected.\n",
1087 p
->stats
.collisions
++;
1088 } else if (status
& TCMD_NOCARRIER
) {
1089 p
->stats
.tx_carrier_errors
++;
1090 printk(KERN_ERR
"%s: no carrier detected.\n",
1092 } else if (status
& TCMD_LOSTCTS
)
1093 printk(KERN_ERR
"%s: loss of CTS detected.\n",
1095 else if (status
& TCMD_UNDERRUN
) {
1096 p
->stats
.tx_fifo_errors
++;
1097 printk(KERN_ERR
"%s: DMA underrun detected.\n",
1099 } else if (status
& TCMD_MAXCOLL
) {
1100 printk(KERN_ERR
"%s: Max. collisions exceeded.\n",
1102 p
->stats
.collisions
+= 16;
1105 #if (NUM_XMIT_BUFFS > 1)
1106 if ((++p
->xmit_last
) == NUM_XMIT_BUFFS
)
1109 netif_wake_queue(dev
);
1112 /***********************************************************
1113 * (re)start the receiver
1116 static void startrecv586(struct net_device
*dev
)
1118 struct priv
*p
= netdev_priv(dev
);
1120 wait_for_scb_cmd(dev
);
1121 wait_for_scb_cmd_ruc(dev
);
1122 writew(make16(p
->rfd_first
), &p
->scb
->rfa_offset
);
1123 writeb(RUC_START
, &p
->scb
->cmd_ruc
);
1124 ni_attn586(); /* start cmd. */
1125 wait_for_scb_cmd_ruc(dev
);
1126 /* wait for accept cmd. (no timeout!!) */
1129 static void ni52_timeout(struct net_device
*dev
)
1131 struct priv
*p
= netdev_priv(dev
);
1132 #ifndef NO_NOPCOMMANDS
1133 if (readb(&p
->scb
->cus
) & CU_ACTIVE
) { /* COMMAND-UNIT active? */
1134 netif_wake_queue(dev
);
1136 printk(KERN_ERR
"%s: strange ... timeout with CU active?!?\n",
1138 printk(KERN_ERR
"%s: X0: %04x N0: %04x N1: %04x %d\n",
1139 dev
->name
, (int)p
->xmit_cmds
[0]->cmd_status
,
1140 readw(&p
->nop_cmds
[0]->cmd_status
),
1141 readw(&p
->nop_cmds
[1]->cmd_status
),
1144 writeb(CUC_ABORT
, &p
->scb
->cmd_cuc
);
1146 wait_for_scb_cmd(dev
);
1147 writew(make16(p
->nop_cmds
[p
->nop_point
]), &p
->scb
->cbl_offset
);
1148 writeb(CUC_START
, &p
->scb
->cmd_cuc
);
1150 wait_for_scb_cmd(dev
);
1151 dev
->trans_start
= jiffies
;
1157 printk(KERN_ERR
"%s: xmitter timed out, try to restart! stat: %02x\n",
1158 dev
->name
, readb(&p
->scb
->cus
));
1159 printk(KERN_ERR
"%s: command-stats: %04x %04x\n",
1161 readw(&p
->xmit_cmds
[0]->cmd_status
),
1162 readw(&p
->xmit_cmds
[1]->cmd_status
));
1163 printk(KERN_ERR
"%s: check, whether you set the right interrupt number!\n",
1169 dev
->trans_start
= jiffies
;
1172 /******************************************************
1176 static int ni52_send_packet(struct sk_buff
*skb
, struct net_device
*dev
)
1179 #ifndef NO_NOPCOMMANDS
1182 struct priv
*p
= netdev_priv(dev
);
1184 if (skb
->len
> XMIT_BUFF_SIZE
) {
1185 printk(KERN_ERR
"%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n", dev
->name
, XMIT_BUFF_SIZE
, skb
->len
);
1186 return NETDEV_TX_OK
;
1189 netif_stop_queue(dev
);
1191 memcpy_toio(p
->xmit_cbuffs
[p
->xmit_count
], skb
->data
, skb
->len
);
1193 if (len
< ETH_ZLEN
) {
1195 memset_io(p
->xmit_cbuffs
[p
->xmit_count
]+skb
->len
, 0,
1199 #if (NUM_XMIT_BUFFS == 1)
1200 # ifdef NO_NOPCOMMANDS
1203 if (readb(&p
->scb
->cus
) & CU_ACTIVE
) {
1204 printk(KERN_ERR
"%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev
->name
);
1205 printk(KERN_ERR
"%s: stat: %04x %04x\n",
1206 dev
->name
, readb(&p
->scb
->cus
),
1207 readw(&p
->xmit_cmds
[0]->cmd_status
));
1210 writew(TBD_LAST
| len
, &p
->xmit_buffs
[0]->size
);
1211 for (i
= 0; i
< 16; i
++) {
1212 writew(0, &p
->xmit_cmds
[0]->cmd_status
);
1213 wait_for_scb_cmd(dev
);
1214 if ((readb(&p
->scb
->cus
) & CU_STATUS
) == CU_SUSPEND
)
1215 writeb(CUC_RESUME
, &p
->scb
->cmd_cuc
);
1217 writew(make16(p
->xmit_cmds
[0]), &p
->scb
->cbl_offset
);
1218 writeb(CUC_START
, &p
->scb
->cmd_cuc
);
1221 dev
->trans_start
= jiffies
;
1224 wait_for_scb_cmd(dev
);
1225 /* test it, because CU sometimes doesn't start immediately */
1226 if (readb(&p
->scb
->cus
) & CU_ACTIVE
)
1228 if (readw(&p
->xmit_cmds
[0]->cmd_status
))
1231 printk(KERN_WARNING
"%s: Can't start transmit-command.\n", dev
->name
);
1234 next_nop
= (p
->nop_point
+ 1) & 0x1;
1235 writew(TBD_LAST
| len
, &p
->xmit_buffs
[0]->size
);
1236 writew(make16(p
->nop_cmds
[next_nop
]), &p
->xmit_cmds
[0]->cmd_link
);
1237 writew(make16(p
->nop_cmds
[next_nop
]),
1238 &p
->nop_cmds
[next_nop
]->cmd_link
);
1239 writew(0, &p
->xmit_cmds
[0]->cmd_status
);
1240 writew(0, &p
->nop_cmds
[next_nop
]->cmd_status
);
1242 writew(make16(p
->xmit_cmds
[0]), &p
->nop_cmds
[p
->nop_point
]->cmd_link
);
1243 dev
->trans_start
= jiffies
;
1244 p
->nop_point
= next_nop
;
1248 writew(TBD_LAST
| len
, &p
->xmit_buffs
[p
->xmit_count
]->size
);
1249 next_nop
= p
->xmit_count
+ 1
1250 if (next_nop
== NUM_XMIT_BUFFS
)
1252 writew(0, &p
->xmit_cmds
[p
->xmit_count
]->cmd_status
);
1253 /* linkpointer of xmit-command already points to next nop cmd */
1254 writew(make16(p
->nop_cmds
[next_nop
]),
1255 &p
->nop_cmds
[next_nop
]->cmd_link
);
1256 writew(0, &p
->nop_cmds
[next_nop
]->cmd_status
);
1257 writew(make16(p
->xmit_cmds
[p
->xmit_count
]),
1258 &p
->nop_cmds
[p
->xmit_count
]->cmd_link
);
1259 dev
->trans_start
= jiffies
;
1260 p
->xmit_count
= next_nop
;
1262 unsigned long flags
;
1263 spin_lock_irqsave(&p
->spinlock
);
1264 if (p
->xmit_count
!= p
->xmit_last
)
1265 netif_wake_queue(dev
);
1266 spin_unlock_irqrestore(&p
->spinlock
);
1270 return NETDEV_TX_OK
;
1273 /*******************************************
1274 * Someone wanna have the statistics
1277 static struct net_device_stats
*ni52_get_stats(struct net_device
*dev
)
1279 struct priv
*p
= netdev_priv(dev
);
1280 unsigned short crc
, aln
, rsc
, ovrn
;
1282 /* Get error-statistics from the ni82586 */
1283 crc
= readw(&p
->scb
->crc_errs
);
1284 writew(0, &p
->scb
->crc_errs
);
1285 aln
= readw(&p
->scb
->aln_errs
);
1286 writew(0, &p
->scb
->aln_errs
);
1287 rsc
= readw(&p
->scb
->rsc_errs
);
1288 writew(0, &p
->scb
->rsc_errs
);
1289 ovrn
= readw(&p
->scb
->ovrn_errs
);
1290 writew(0, &p
->scb
->ovrn_errs
);
1292 p
->stats
.rx_crc_errors
+= crc
;
1293 p
->stats
.rx_fifo_errors
+= ovrn
;
1294 p
->stats
.rx_frame_errors
+= aln
;
1295 p
->stats
.rx_dropped
+= rsc
;
1300 /********************************************************
1304 static void set_multicast_list(struct net_device
*dev
)
1306 netif_stop_queue(dev
);
1312 netif_wake_queue(dev
);
1316 static struct net_device
*dev_ni52
;
1318 module_param(io
, int, 0);
1319 module_param(irq
, int, 0);
1320 module_param(memstart
, long, 0);
1321 module_param(memend
, long, 0);
1322 MODULE_PARM_DESC(io
, "NI5210 I/O base address,required");
1323 MODULE_PARM_DESC(irq
, "NI5210 IRQ number,required");
1324 MODULE_PARM_DESC(memstart
, "NI5210 memory base address,required");
1325 MODULE_PARM_DESC(memend
, "NI5210 memory end address,required");
1327 int __init
init_module(void)
1329 if (io
<= 0x0 || !memend
|| !memstart
|| irq
< 2) {
1330 printk(KERN_ERR
"ni52: Autoprobing not allowed for modules.\n");
1331 printk(KERN_ERR
"ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1334 dev_ni52
= ni52_probe(-1);
1335 if (IS_ERR(dev_ni52
))
1336 return PTR_ERR(dev_ni52
);
1340 void __exit
cleanup_module(void)
1342 struct priv
*p
= netdev_priv(dev_ni52
);
1343 unregister_netdev(dev_ni52
);
1345 release_region(dev_ni52
->base_addr
, NI52_TOTAL_SIZE
);
1346 free_netdev(dev_ni52
);
1350 MODULE_LICENSE("GPL");