Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | net-3-driver for the 3c523 Etherlink/MC card (i82586 Ethernet chip) | |
3 | ||
4 | ||
5 | This is an extension to the Linux operating system, and is covered by the | |
6 | same GNU General Public License that covers that work. | |
7 | ||
8 | Copyright 1995, 1996 by Chris Beauregard (cpbeaure@undergrad.math.uwaterloo.ca) | |
9 | ||
10 | This is basically Michael Hipp's ni52 driver, with a new probing | |
11 | algorithm and some minor changes to the 82586 CA and reset routines. | |
12 | Thanks a lot Michael for a really clean i82586 implementation! Unless | |
13 | otherwise documented in ni52.c, any bugs are mine. | |
14 | ||
15 | Contrary to the Ethernet-HOWTO, this isn't based on the 3c507 driver in | |
16 | any way. The ni52 is a lot easier to modify. | |
17 | ||
18 | sources: | |
19 | ni52.c | |
20 | ||
21 | Crynwr packet driver collection was a great reference for my first | |
22 | attempt at this sucker. The 3c507 driver also helped, until I noticed | |
23 | that ni52.c was a lot nicer. | |
24 | ||
25 | EtherLink/MC: Micro Channel Ethernet Adapter Technical Reference | |
26 | Manual, courtesy of 3Com CardFacts, documents the 3c523-specific | |
27 | stuff. Information on CardFacts is found in the Ethernet HOWTO. | |
28 | Also see <a href="http://www.3com.com/"> | |
29 | ||
30 | Microprocessor Communications Support Chips, T.J. Byers, ISBN | |
31 | 0-444-01224-9, has a section on the i82586. It tells you just enough | |
32 | to know that you really don't want to learn how to program the chip. | |
33 | ||
34 | The original device probe code was stolen from ps2esdi.c | |
35 | ||
36 | Known Problems: | |
37 | Since most of the code was stolen from ni52.c, you'll run across the | |
38 | same bugs in the 0.62 version of ni52.c, plus maybe a few because of | |
39 | the 3c523 idiosynchacies. The 3c523 has 16K of RAM though, so there | |
40 | shouldn't be the overrun problem that the 8K ni52 has. | |
41 | ||
42 | This driver is for a 16K adapter. It should work fine on the 64K | |
43 | adapters, but it will only use one of the 4 banks of RAM. Modifying | |
44 | this for the 64K version would require a lot of heinous bank | |
45 | switching, which I'm sure not interested in doing. If you try to | |
46 | implement a bank switching version, you'll basically have to remember | |
47 | what bank is enabled and do a switch everytime you access a memory | |
48 | location that's not current. You'll also have to remap pointers on | |
49 | the driver side, because it only knows about 16K of the memory. | |
50 | Anyone desperate or masochistic enough to try? | |
51 | ||
52 | It seems to be stable now when multiple transmit buffers are used. I | |
53 | can't see any performance difference, but then I'm working on a 386SX. | |
54 | ||
55 | Multicast doesn't work. It doesn't even pretend to work. Don't use | |
56 | it. Don't compile your kernel with multicast support. I don't know | |
57 | why. | |
58 | ||
59 | Features: | |
60 | This driver is useable as a loadable module. If you try to specify an | |
61 | IRQ or a IO address (via insmod 3c523.o irq=xx io=0xyyy), it will | |
62 | search the MCA slots until it finds a 3c523 with the specified | |
63 | parameters. | |
64 | ||
65 | This driver does support multiple ethernet cards when used as a module | |
66 | (up to MAX_3C523_CARDS, the default being 4) | |
67 | ||
68 | This has been tested with both BNC and TP versions, internal and | |
69 | external transceivers. Haven't tested with the 64K version (that I | |
70 | know of). | |
71 | ||
72 | History: | |
73 | Jan 1st, 1996 | |
74 | first public release | |
75 | Feb 4th, 1996 | |
76 | update to 1.3.59, incorporated multicast diffs from ni52.c | |
77 | Feb 15th, 1996 | |
78 | added shared irq support | |
79 | Apr 1999 | |
80 | added support for multiple cards when used as a module | |
81 | added option to disable multicast as is causes problems | |
82 | Ganesh Sittampalam <ganesh.sittampalam@magdalen.oxford.ac.uk> | |
83 | Stuart Adamson <stuart.adamson@compsoc.net> | |
84 | Nov 2001 | |
85 | added support for ethtool (jgarzik) | |
86 | ||
87 | $Header: /fsys2/home/chrisb/linux-1.3.59-MCA/drivers/net/RCS/3c523.c,v 1.1 1996/02/05 01:53:46 chrisb Exp chrisb $ | |
88 | */ | |
89 | ||
90 | #define DRV_NAME "3c523" | |
91 | #define DRV_VERSION "17-Nov-2001" | |
92 | ||
93 | #include <linux/init.h> | |
94 | #include <linux/netdevice.h> | |
95 | #include <linux/etherdevice.h> | |
96 | #include <linux/module.h> | |
97 | #include <linux/kernel.h> | |
98 | #include <linux/string.h> | |
99 | #include <linux/errno.h> | |
100 | #include <linux/ioport.h> | |
101 | #include <linux/skbuff.h> | |
102 | #include <linux/slab.h> | |
103 | #include <linux/interrupt.h> | |
104 | #include <linux/delay.h> | |
105 | #include <linux/mca-legacy.h> | |
106 | #include <linux/ethtool.h> | |
107 | #include <linux/bitops.h> | |
108 | ||
109 | #include <asm/uaccess.h> | |
110 | #include <asm/processor.h> | |
111 | #include <asm/io.h> | |
112 | ||
113 | #include "3c523.h" | |
114 | ||
115 | /*************************************************************************/ | |
116 | #define DEBUG /* debug on */ | |
117 | #define SYSBUSVAL 0 /* 1 = 8 Bit, 0 = 16 bit - 3c523 only does 16 bit */ | |
118 | #undef ELMC_MULTICAST /* Disable multicast support as it is somewhat seriously broken at the moment */ | |
119 | ||
120 | #define make32(ptr16) (p->memtop + (short) (ptr16) ) | |
121 | #define make24(ptr32) ((char *) (ptr32) - p->base) | |
122 | #define make16(ptr32) ((unsigned short) ((unsigned long) (ptr32) - (unsigned long) p->memtop )) | |
123 | ||
124 | /*************************************************************************/ | |
125 | /* | |
126 | Tables to which we can map values in the configuration registers. | |
127 | */ | |
128 | static int irq_table[] __initdata = { | |
129 | 12, 7, 3, 9 | |
130 | }; | |
131 | ||
132 | static int csr_table[] __initdata = { | |
133 | 0x300, 0x1300, 0x2300, 0x3300 | |
134 | }; | |
135 | ||
136 | static int shm_table[] __initdata = { | |
137 | 0x0c0000, 0x0c8000, 0x0d0000, 0x0d8000 | |
138 | }; | |
139 | ||
140 | /******************* how to calculate the buffers ***************************** | |
141 | ||
142 | ||
143 | * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works | |
144 | * --------------- in a different (more stable?) mode. Only in this mode it's | |
145 | * possible to configure the driver with 'NO_NOPCOMMANDS' | |
146 | ||
147 | sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8; | |
148 | sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT | |
149 | sizeof(rfd) = 24; sizeof(rbd) = 12; | |
150 | sizeof(tbd) = 8; sizeof(transmit_cmd) = 16; | |
151 | sizeof(nop_cmd) = 8; | |
152 | ||
153 | * if you don't know the driver, better do not change this values: */ | |
154 | ||
155 | #define RECV_BUFF_SIZE 1524 /* slightly oversized */ | |
156 | #define XMIT_BUFF_SIZE 1524 /* slightly oversized */ | |
157 | #define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */ | |
158 | #define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */ | |
159 | #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */ | |
160 | ||
161 | #if (NUM_XMIT_BUFFS == 1) | |
162 | #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */ | |
163 | #endif | |
164 | ||
165 | /**************************************************************************/ | |
166 | ||
167 | #define DELAY(x) { mdelay(32 * x); } | |
168 | ||
169 | /* a much shorter delay: */ | |
170 | #define DELAY_16(); { udelay(16) ; } | |
171 | ||
172 | /* wait for command with timeout: */ | |
173 | #define WAIT_4_SCB_CMD() { int i; \ | |
174 | for(i=0;i<1024;i++) { \ | |
175 | if(!p->scb->cmd) break; \ | |
176 | DELAY_16(); \ | |
177 | if(i == 1023) { \ | |
178 | printk(KERN_WARNING "%s:%d: scb_cmd timed out .. resetting i82586\n",\ | |
179 | dev->name,__LINE__); \ | |
180 | elmc_id_reset586(); } } } | |
181 | ||
182 | static irqreturn_t elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr); | |
183 | static int elmc_open(struct net_device *dev); | |
184 | static int elmc_close(struct net_device *dev); | |
185 | static int elmc_send_packet(struct sk_buff *, struct net_device *); | |
186 | static struct net_device_stats *elmc_get_stats(struct net_device *dev); | |
187 | static void elmc_timeout(struct net_device *dev); | |
188 | #ifdef ELMC_MULTICAST | |
189 | static void set_multicast_list(struct net_device *dev); | |
190 | #endif | |
191 | static struct ethtool_ops netdev_ethtool_ops; | |
192 | ||
193 | /* helper-functions */ | |
194 | static int init586(struct net_device *dev); | |
195 | static int check586(struct net_device *dev, unsigned long where, unsigned size); | |
196 | static void alloc586(struct net_device *dev); | |
197 | static void startrecv586(struct net_device *dev); | |
198 | static void *alloc_rfa(struct net_device *dev, void *ptr); | |
199 | static void elmc_rcv_int(struct net_device *dev); | |
200 | static void elmc_xmt_int(struct net_device *dev); | |
201 | static void elmc_rnr_int(struct net_device *dev); | |
202 | ||
203 | struct priv { | |
204 | struct net_device_stats stats; | |
205 | unsigned long base; | |
206 | char *memtop; | |
207 | unsigned long mapped_start; /* Start of ioremap */ | |
208 | volatile struct rfd_struct *rfd_last, *rfd_top, *rfd_first; | |
209 | volatile struct scp_struct *scp; /* volatile is important */ | |
210 | volatile struct iscp_struct *iscp; /* volatile is important */ | |
211 | volatile struct scb_struct *scb; /* volatile is important */ | |
212 | volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS]; | |
213 | #if (NUM_XMIT_BUFFS == 1) | |
214 | volatile struct transmit_cmd_struct *xmit_cmds[2]; | |
215 | volatile struct nop_cmd_struct *nop_cmds[2]; | |
216 | #else | |
217 | volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS]; | |
218 | volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS]; | |
219 | #endif | |
220 | volatile int nop_point, num_recv_buffs; | |
221 | volatile char *xmit_cbuffs[NUM_XMIT_BUFFS]; | |
222 | volatile int xmit_count, xmit_last; | |
223 | volatile int slot; | |
224 | }; | |
225 | ||
226 | #define elmc_attn586() {elmc_do_attn586(dev->base_addr,ELMC_CTRL_INTE);} | |
227 | #define elmc_reset586() {elmc_do_reset586(dev->base_addr,ELMC_CTRL_INTE);} | |
228 | ||
229 | /* with interrupts disabled - this will clear the interrupt bit in the | |
230 | 3c523 control register, and won't put it back. This effectively | |
231 | disables interrupts on the card. */ | |
232 | #define elmc_id_attn586() {elmc_do_attn586(dev->base_addr,0);} | |
233 | #define elmc_id_reset586() {elmc_do_reset586(dev->base_addr,0);} | |
234 | ||
235 | /*************************************************************************/ | |
236 | /* | |
237 | Do a Channel Attention on the 3c523. This is extremely board dependent. | |
238 | */ | |
239 | static void elmc_do_attn586(int ioaddr, int ints) | |
240 | { | |
241 | /* the 3c523 requires a minimum of 500 ns. The delays here might be | |
242 | a little too large, and hence they may cut the performance of the | |
243 | card slightly. If someone who knows a little more about Linux | |
244 | timing would care to play with these, I'd appreciate it. */ | |
245 | ||
246 | /* this bit masking stuff is crap. I'd rather have separate | |
247 | registers with strobe triggers for each of these functions. <sigh> | |
248 | Ya take what ya got. */ | |
249 | ||
250 | outb(ELMC_CTRL_RST | 0x3 | ELMC_CTRL_CA | ints, ioaddr + ELMC_CTRL); | |
251 | DELAY_16(); /* > 500 ns */ | |
252 | outb(ELMC_CTRL_RST | 0x3 | ints, ioaddr + ELMC_CTRL); | |
253 | } | |
254 | ||
255 | /*************************************************************************/ | |
256 | /* | |
257 | Reset the 82586 on the 3c523. Also very board dependent. | |
258 | */ | |
259 | static void elmc_do_reset586(int ioaddr, int ints) | |
260 | { | |
261 | /* toggle the RST bit low then high */ | |
262 | outb(0x3 | ELMC_CTRL_LBK, ioaddr + ELMC_CTRL); | |
263 | DELAY_16(); /* > 500 ns */ | |
264 | outb(ELMC_CTRL_RST | ELMC_CTRL_LBK | 0x3, ioaddr + ELMC_CTRL); | |
265 | ||
266 | elmc_do_attn586(ioaddr, ints); | |
267 | } | |
268 | ||
269 | /********************************************** | |
270 | * close device | |
271 | */ | |
272 | ||
273 | static int elmc_close(struct net_device *dev) | |
274 | { | |
275 | netif_stop_queue(dev); | |
276 | elmc_id_reset586(); /* the hard way to stop the receiver */ | |
277 | free_irq(dev->irq, dev); | |
278 | return 0; | |
279 | } | |
280 | ||
281 | /********************************************** | |
282 | * open device | |
283 | */ | |
284 | ||
285 | static int elmc_open(struct net_device *dev) | |
286 | { | |
287 | int ret; | |
288 | ||
289 | elmc_id_attn586(); /* disable interrupts */ | |
290 | ||
291 | ret = request_irq(dev->irq, &elmc_interrupt, SA_SHIRQ | SA_SAMPLE_RANDOM, | |
292 | dev->name, dev); | |
293 | if (ret) { | |
294 | printk(KERN_ERR "%s: couldn't get irq %d\n", dev->name, dev->irq); | |
295 | elmc_id_reset586(); | |
296 | return ret; | |
297 | } | |
298 | alloc586(dev); | |
299 | init586(dev); | |
300 | startrecv586(dev); | |
301 | netif_start_queue(dev); | |
302 | return 0; /* most done by init */ | |
303 | } | |
304 | ||
305 | /********************************************** | |
306 | * Check to see if there's an 82586 out there. | |
307 | */ | |
308 | ||
309 | static int __init check586(struct net_device *dev, unsigned long where, unsigned size) | |
310 | { | |
311 | struct priv *p = (struct priv *) dev->priv; | |
312 | char *iscp_addrs[2]; | |
313 | int i = 0; | |
314 | ||
315 | p->base = (unsigned long) isa_bus_to_virt((unsigned long)where) + size - 0x01000000; | |
316 | p->memtop = isa_bus_to_virt((unsigned long)where) + size; | |
317 | p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS); | |
318 | memset((char *) p->scp, 0, sizeof(struct scp_struct)); | |
319 | p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */ | |
320 | ||
321 | iscp_addrs[0] = isa_bus_to_virt((unsigned long)where); | |
322 | iscp_addrs[1] = (char *) p->scp - sizeof(struct iscp_struct); | |
323 | ||
324 | for (i = 0; i < 2; i++) { | |
325 | p->iscp = (struct iscp_struct *) iscp_addrs[i]; | |
326 | memset((char *) p->iscp, 0, sizeof(struct iscp_struct)); | |
327 | ||
328 | p->scp->iscp = make24(p->iscp); | |
329 | p->iscp->busy = 1; | |
330 | ||
331 | elmc_id_reset586(); | |
332 | ||
333 | /* reset586 does an implicit CA */ | |
334 | ||
335 | /* apparently, you sometimes have to kick the 82586 twice... */ | |
336 | elmc_id_attn586(); | |
337 | DELAY(1); | |
338 | ||
339 | if (p->iscp->busy) { /* i82586 clears 'busy' after successful init */ | |
340 | return 0; | |
341 | } | |
342 | } | |
343 | return 1; | |
344 | } | |
345 | ||
346 | /****************************************************************** | |
347 | * set iscp at the right place, called by elmc_probe and open586. | |
348 | */ | |
349 | ||
350 | void alloc586(struct net_device *dev) | |
351 | { | |
352 | struct priv *p = (struct priv *) dev->priv; | |
353 | ||
354 | elmc_id_reset586(); | |
355 | DELAY(2); | |
356 | ||
357 | p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS); | |
358 | p->scb = (struct scb_struct *) isa_bus_to_virt(dev->mem_start); | |
359 | p->iscp = (struct iscp_struct *) ((char *) p->scp - sizeof(struct iscp_struct)); | |
360 | ||
361 | memset((char *) p->iscp, 0, sizeof(struct iscp_struct)); | |
362 | memset((char *) p->scp, 0, sizeof(struct scp_struct)); | |
363 | ||
364 | p->scp->iscp = make24(p->iscp); | |
365 | p->scp->sysbus = SYSBUSVAL; | |
366 | p->iscp->scb_offset = make16(p->scb); | |
367 | ||
368 | p->iscp->busy = 1; | |
369 | elmc_id_reset586(); | |
370 | elmc_id_attn586(); | |
371 | ||
372 | DELAY(2); | |
373 | ||
374 | if (p->iscp->busy) { | |
375 | printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name); | |
376 | } | |
377 | memset((char *) p->scb, 0, sizeof(struct scb_struct)); | |
378 | } | |
379 | ||
380 | /*****************************************************************/ | |
381 | ||
382 | static int elmc_getinfo(char *buf, int slot, void *d) | |
383 | { | |
384 | int len = 0; | |
385 | struct net_device *dev = (struct net_device *) d; | |
386 | int i; | |
387 | ||
388 | if (dev == NULL) | |
389 | return len; | |
390 | ||
391 | len += sprintf(buf + len, "Revision: 0x%x\n", | |
392 | inb(dev->base_addr + ELMC_REVISION) & 0xf); | |
393 | len += sprintf(buf + len, "IRQ: %d\n", dev->irq); | |
394 | len += sprintf(buf + len, "IO Address: %#lx-%#lx\n", dev->base_addr, | |
395 | dev->base_addr + ELMC_IO_EXTENT); | |
396 | len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start, | |
397 | dev->mem_end - 1); | |
398 | len += sprintf(buf + len, "Transceiver: %s\n", dev->if_port ? | |
399 | "External" : "Internal"); | |
400 | len += sprintf(buf + len, "Device: %s\n", dev->name); | |
401 | len += sprintf(buf + len, "Hardware Address:"); | |
402 | for (i = 0; i < 6; i++) { | |
403 | len += sprintf(buf + len, " %02x", dev->dev_addr[i]); | |
404 | } | |
405 | buf[len++] = '\n'; | |
406 | buf[len] = 0; | |
407 | ||
408 | return len; | |
409 | } /* elmc_getinfo() */ | |
410 | ||
411 | /*****************************************************************/ | |
412 | ||
413 | static int __init do_elmc_probe(struct net_device *dev) | |
414 | { | |
415 | static int slot; | |
416 | int base_addr = dev->base_addr; | |
417 | int irq = dev->irq; | |
418 | u_char status = 0; | |
419 | u_char revision = 0; | |
420 | int i = 0; | |
421 | unsigned int size = 0; | |
422 | int retval; | |
423 | struct priv *pr = dev->priv; | |
424 | ||
425 | SET_MODULE_OWNER(dev); | |
426 | if (MCA_bus == 0) { | |
427 | return -ENODEV; | |
428 | } | |
429 | /* search through the slots for the 3c523. */ | |
430 | slot = mca_find_adapter(ELMC_MCA_ID, 0); | |
431 | while (slot != -1) { | |
432 | status = mca_read_stored_pos(slot, 2); | |
433 | ||
434 | dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6]; | |
435 | dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1]; | |
436 | ||
437 | /* | |
438 | If we're trying to match a specified irq or IO address, | |
439 | we'll reject a match unless it's what we're looking for. | |
440 | Also reject it if the card is already in use. | |
441 | */ | |
442 | ||
443 | if ((irq && irq != dev->irq) || | |
444 | (base_addr && base_addr != dev->base_addr)) { | |
445 | slot = mca_find_adapter(ELMC_MCA_ID, slot + 1); | |
446 | continue; | |
447 | } | |
448 | if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) { | |
449 | slot = mca_find_adapter(ELMC_MCA_ID, slot + 1); | |
450 | continue; | |
451 | } | |
452 | ||
453 | /* found what we're looking for... */ | |
454 | break; | |
455 | } | |
456 | ||
457 | /* we didn't find any 3c523 in the slots we checked for */ | |
458 | if (slot == MCA_NOTFOUND) | |
459 | return ((base_addr || irq) ? -ENXIO : -ENODEV); | |
460 | ||
461 | mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC"); | |
462 | mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev); | |
463 | ||
464 | /* if we get this far, adapter has been found - carry on */ | |
465 | printk(KERN_INFO "%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1); | |
466 | ||
467 | /* Now we extract configuration info from the card. | |
468 | The 3c523 provides information in two of the POS registers, but | |
469 | the second one is only needed if we want to tell the card what IRQ | |
470 | to use. I suspect that whoever sets the thing up initially would | |
471 | prefer we don't screw with those things. | |
472 | ||
473 | Note that we read the status info when we found the card... | |
474 | ||
475 | See 3c523.h for more details. | |
476 | */ | |
477 | ||
478 | /* revision is stored in the first 4 bits of the revision register */ | |
479 | revision = inb(dev->base_addr + ELMC_REVISION) & 0xf; | |
480 | ||
481 | /* according to docs, we read the interrupt and write it back to | |
482 | the IRQ select register, since the POST might not configure the IRQ | |
483 | properly. */ | |
484 | switch (dev->irq) { | |
485 | case 3: | |
486 | mca_write_pos(slot, 3, 0x04); | |
487 | break; | |
488 | case 7: | |
489 | mca_write_pos(slot, 3, 0x02); | |
490 | break; | |
491 | case 9: | |
492 | mca_write_pos(slot, 3, 0x08); | |
493 | break; | |
494 | case 12: | |
495 | mca_write_pos(slot, 3, 0x01); | |
496 | break; | |
497 | } | |
498 | ||
499 | memset(pr, 0, sizeof(struct priv)); | |
500 | pr->slot = slot; | |
501 | ||
502 | printk(KERN_INFO "%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision, | |
503 | dev->base_addr); | |
504 | ||
505 | /* Determine if we're using the on-board transceiver (i.e. coax) or | |
506 | an external one. The information is pretty much useless, but I | |
507 | guess it's worth brownie points. */ | |
508 | dev->if_port = (status & ELMC_STATUS_DISABLE_THIN); | |
509 | ||
510 | /* The 3c523 has a 24K chunk of memory. The first 16K is the | |
511 | shared memory, while the last 8K is for the EtherStart BIOS ROM. | |
512 | Which we don't care much about here. We'll just tell Linux that | |
513 | we're using 16K. MCA won't permit address space conflicts caused | |
514 | by not mapping the other 8K. */ | |
515 | dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3]; | |
516 | ||
517 | /* We're using MCA, so it's a given that the information about memory | |
518 | size is correct. The Crynwr drivers do something like this. */ | |
519 | ||
520 | elmc_id_reset586(); /* seems like a good idea before checking it... */ | |
521 | ||
522 | size = 0x4000; /* check for 16K mem */ | |
523 | if (!check586(dev, dev->mem_start, size)) { | |
524 | printk(KERN_ERR "%s: memprobe, Can't find memory at 0x%lx!\n", dev->name, | |
525 | dev->mem_start); | |
526 | retval = -ENODEV; | |
527 | goto err_out; | |
528 | } | |
529 | dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */ | |
530 | ||
531 | pr->memtop = isa_bus_to_virt(dev->mem_start) + size; | |
532 | pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000; | |
533 | alloc586(dev); | |
534 | ||
535 | elmc_id_reset586(); /* make sure it doesn't generate spurious ints */ | |
536 | ||
537 | /* set number of receive-buffs according to memsize */ | |
538 | pr->num_recv_buffs = NUM_RECV_BUFFS_16; | |
539 | ||
540 | /* dump all the assorted information */ | |
541 | printk(KERN_INFO "%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name, | |
542 | dev->irq, dev->if_port ? "ex" : "in", | |
543 | dev->mem_start, dev->mem_end - 1); | |
544 | ||
545 | /* The hardware address for the 3c523 is stored in the first six | |
546 | bytes of the IO address. */ | |
547 | printk(KERN_INFO "%s: hardware address ", dev->name); | |
548 | for (i = 0; i < 6; i++) { | |
549 | dev->dev_addr[i] = inb(dev->base_addr + i); | |
550 | printk(" %02x", dev->dev_addr[i]); | |
551 | } | |
552 | printk("\n"); | |
553 | ||
554 | dev->open = &elmc_open; | |
555 | dev->stop = &elmc_close; | |
556 | dev->get_stats = &elmc_get_stats; | |
557 | dev->hard_start_xmit = &elmc_send_packet; | |
558 | dev->tx_timeout = &elmc_timeout; | |
559 | dev->watchdog_timeo = HZ; | |
560 | #ifdef ELMC_MULTICAST | |
561 | dev->set_multicast_list = &set_multicast_list; | |
562 | #else | |
563 | dev->set_multicast_list = NULL; | |
564 | #endif | |
565 | dev->ethtool_ops = &netdev_ethtool_ops; | |
566 | ||
567 | /* note that we haven't actually requested the IRQ from the kernel. | |
568 | That gets done in elmc_open(). I'm not sure that's such a good idea, | |
569 | but it works, so I'll go with it. */ | |
570 | ||
571 | #ifndef ELMC_MULTICAST | |
572 | dev->flags&=~IFF_MULTICAST; /* Multicast doesn't work */ | |
573 | #endif | |
574 | ||
b1fc5505 | 575 | retval = register_netdev(dev); |
576 | if (retval) | |
577 | goto err_out; | |
578 | ||
1da177e4 LT |
579 | return 0; |
580 | err_out: | |
581 | mca_set_adapter_procfn(slot, NULL, NULL); | |
582 | release_region(dev->base_addr, ELMC_IO_EXTENT); | |
583 | return retval; | |
584 | } | |
585 | ||
586 | static void cleanup_card(struct net_device *dev) | |
587 | { | |
588 | mca_set_adapter_procfn(((struct priv *) (dev->priv))->slot, NULL, NULL); | |
589 | release_region(dev->base_addr, ELMC_IO_EXTENT); | |
590 | } | |
591 | ||
592 | #ifndef MODULE | |
593 | struct net_device * __init elmc_probe(int unit) | |
594 | { | |
595 | struct net_device *dev = alloc_etherdev(sizeof(struct priv)); | |
596 | int err; | |
597 | ||
598 | if (!dev) | |
599 | return ERR_PTR(-ENOMEM); | |
600 | ||
601 | sprintf(dev->name, "eth%d", unit); | |
602 | netdev_boot_setup_check(dev); | |
603 | ||
604 | err = do_elmc_probe(dev); | |
605 | if (err) | |
606 | goto out; | |
1da177e4 | 607 | return dev; |
1da177e4 LT |
608 | out: |
609 | free_netdev(dev); | |
610 | return ERR_PTR(err); | |
611 | } | |
612 | #endif | |
613 | ||
614 | /********************************************** | |
615 | * init the chip (elmc-interrupt should be disabled?!) | |
616 | * needs a correct 'allocated' memory | |
617 | */ | |
618 | ||
619 | static int init586(struct net_device *dev) | |
620 | { | |
621 | void *ptr; | |
622 | unsigned long s; | |
623 | int i, result = 0; | |
624 | struct priv *p = (struct priv *) dev->priv; | |
625 | volatile struct configure_cmd_struct *cfg_cmd; | |
626 | volatile struct iasetup_cmd_struct *ias_cmd; | |
627 | volatile struct tdr_cmd_struct *tdr_cmd; | |
628 | volatile struct mcsetup_cmd_struct *mc_cmd; | |
629 | struct dev_mc_list *dmi = dev->mc_list; | |
630 | int num_addrs = dev->mc_count; | |
631 | ||
632 | ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct)); | |
633 | ||
634 | cfg_cmd = (struct configure_cmd_struct *) ptr; /* configure-command */ | |
635 | cfg_cmd->cmd_status = 0; | |
636 | cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST; | |
637 | cfg_cmd->cmd_link = 0xffff; | |
638 | ||
639 | cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */ | |
640 | cfg_cmd->fifo = 0x08; /* fifo-limit (8=tx:32/rx:64) */ | |
641 | cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */ | |
642 | cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */ | |
643 | cfg_cmd->priority = 0x00; | |
644 | cfg_cmd->ifs = 0x60; | |
645 | cfg_cmd->time_low = 0x00; | |
646 | cfg_cmd->time_high = 0xf2; | |
647 | cfg_cmd->promisc = 0; | |
648 | if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC)) { | |
649 | cfg_cmd->promisc = 1; | |
650 | dev->flags |= IFF_PROMISC; | |
651 | } | |
652 | cfg_cmd->carr_coll = 0x00; | |
653 | ||
654 | p->scb->cbl_offset = make16(cfg_cmd); | |
655 | ||
656 | p->scb->cmd = CUC_START; /* cmd.-unit start */ | |
657 | elmc_id_attn586(); | |
658 | ||
659 | s = jiffies; /* warning: only active with interrupts on !! */ | |
660 | while (!(cfg_cmd->cmd_status & STAT_COMPL)) { | |
661 | if (jiffies - s > 30*HZ/100) | |
662 | break; | |
663 | } | |
664 | ||
665 | if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) { | |
666 | printk(KERN_WARNING "%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status); | |
667 | return 1; | |
668 | } | |
669 | /* | |
670 | * individual address setup | |
671 | */ | |
672 | ias_cmd = (struct iasetup_cmd_struct *) ptr; | |
673 | ||
674 | ias_cmd->cmd_status = 0; | |
675 | ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST; | |
676 | ias_cmd->cmd_link = 0xffff; | |
677 | ||
678 | memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN); | |
679 | ||
680 | p->scb->cbl_offset = make16(ias_cmd); | |
681 | ||
682 | p->scb->cmd = CUC_START; /* cmd.-unit start */ | |
683 | elmc_id_attn586(); | |
684 | ||
685 | s = jiffies; | |
686 | while (!(ias_cmd->cmd_status & STAT_COMPL)) { | |
687 | if (jiffies - s > 30*HZ/100) | |
688 | break; | |
689 | } | |
690 | ||
691 | if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) { | |
692 | printk(KERN_WARNING "%s (elmc): individual address setup command failed: %04x\n", dev->name, ias_cmd->cmd_status); | |
693 | return 1; | |
694 | } | |
695 | /* | |
696 | * TDR, wire check .. e.g. no resistor e.t.c | |
697 | */ | |
698 | tdr_cmd = (struct tdr_cmd_struct *) ptr; | |
699 | ||
700 | tdr_cmd->cmd_status = 0; | |
701 | tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST; | |
702 | tdr_cmd->cmd_link = 0xffff; | |
703 | tdr_cmd->status = 0; | |
704 | ||
705 | p->scb->cbl_offset = make16(tdr_cmd); | |
706 | ||
707 | p->scb->cmd = CUC_START; /* cmd.-unit start */ | |
708 | elmc_attn586(); | |
709 | ||
710 | s = jiffies; | |
711 | while (!(tdr_cmd->cmd_status & STAT_COMPL)) { | |
712 | if (jiffies - s > 30*HZ/100) { | |
713 | printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__); | |
714 | result = 1; | |
715 | break; | |
716 | } | |
717 | } | |
718 | ||
719 | if (!result) { | |
720 | DELAY(2); /* wait for result */ | |
721 | result = tdr_cmd->status; | |
722 | ||
723 | p->scb->cmd = p->scb->status & STAT_MASK; | |
724 | elmc_id_attn586(); /* ack the interrupts */ | |
725 | ||
726 | if (result & TDR_LNK_OK) { | |
727 | /* empty */ | |
728 | } else if (result & TDR_XCVR_PRB) { | |
729 | printk(KERN_WARNING "%s: TDR: Transceiver problem!\n", dev->name); | |
730 | } else if (result & TDR_ET_OPN) { | |
731 | printk(KERN_WARNING "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK); | |
732 | } else if (result & TDR_ET_SRT) { | |
733 | if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */ | |
734 | printk(KERN_WARNING "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK); | |
735 | } else { | |
736 | printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result); | |
737 | } | |
738 | } | |
739 | /* | |
740 | * ack interrupts | |
741 | */ | |
742 | p->scb->cmd = p->scb->status & STAT_MASK; | |
743 | elmc_id_attn586(); | |
744 | ||
745 | /* | |
746 | * alloc nop/xmit-cmds | |
747 | */ | |
748 | #if (NUM_XMIT_BUFFS == 1) | |
749 | for (i = 0; i < 2; i++) { | |
750 | p->nop_cmds[i] = (struct nop_cmd_struct *) ptr; | |
751 | p->nop_cmds[i]->cmd_cmd = CMD_NOP; | |
752 | p->nop_cmds[i]->cmd_status = 0; | |
753 | p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); | |
754 | ptr = (char *) ptr + sizeof(struct nop_cmd_struct); | |
755 | } | |
756 | p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr; /* transmit cmd/buff 0 */ | |
757 | ptr = (char *) ptr + sizeof(struct transmit_cmd_struct); | |
758 | #else | |
759 | for (i = 0; i < NUM_XMIT_BUFFS; i++) { | |
760 | p->nop_cmds[i] = (struct nop_cmd_struct *) ptr; | |
761 | p->nop_cmds[i]->cmd_cmd = CMD_NOP; | |
762 | p->nop_cmds[i]->cmd_status = 0; | |
763 | p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); | |
764 | ptr = (char *) ptr + sizeof(struct nop_cmd_struct); | |
765 | p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr; /*transmit cmd/buff 0 */ | |
766 | ptr = (char *) ptr + sizeof(struct transmit_cmd_struct); | |
767 | } | |
768 | #endif | |
769 | ||
770 | ptr = alloc_rfa(dev, (void *) ptr); /* init receive-frame-area */ | |
771 | ||
772 | /* | |
773 | * Multicast setup | |
774 | */ | |
775 | ||
776 | if (dev->mc_count) { | |
777 | /* I don't understand this: do we really need memory after the init? */ | |
778 | int len = ((char *) p->iscp - (char *) ptr - 8) / 6; | |
779 | if (len <= 0) { | |
780 | printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name); | |
781 | } else { | |
782 | if (len < num_addrs) { | |
783 | num_addrs = len; | |
784 | printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n", | |
785 | dev->name, num_addrs); | |
786 | } | |
787 | mc_cmd = (struct mcsetup_cmd_struct *) ptr; | |
788 | mc_cmd->cmd_status = 0; | |
789 | mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST; | |
790 | mc_cmd->cmd_link = 0xffff; | |
791 | mc_cmd->mc_cnt = num_addrs * 6; | |
792 | for (i = 0; i < num_addrs; i++) { | |
793 | memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6); | |
794 | dmi = dmi->next; | |
795 | } | |
796 | p->scb->cbl_offset = make16(mc_cmd); | |
797 | p->scb->cmd = CUC_START; | |
798 | elmc_id_attn586(); | |
799 | s = jiffies; | |
800 | while (!(mc_cmd->cmd_status & STAT_COMPL)) { | |
801 | if (jiffies - s > 30*HZ/100) | |
802 | break; | |
803 | } | |
804 | if (!(mc_cmd->cmd_status & STAT_COMPL)) { | |
805 | printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name); | |
806 | } | |
807 | } | |
808 | } | |
809 | /* | |
810 | * alloc xmit-buffs / init xmit_cmds | |
811 | */ | |
812 | for (i = 0; i < NUM_XMIT_BUFFS; i++) { | |
813 | p->xmit_cbuffs[i] = (char *) ptr; /* char-buffs */ | |
814 | ptr = (char *) ptr + XMIT_BUFF_SIZE; | |
815 | p->xmit_buffs[i] = (struct tbd_struct *) ptr; /* TBD */ | |
816 | ptr = (char *) ptr + sizeof(struct tbd_struct); | |
817 | if ((void *) ptr > (void *) p->iscp) { | |
818 | printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name); | |
819 | return 1; | |
820 | } | |
821 | memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct)); | |
822 | memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct)); | |
823 | p->xmit_cmds[i]->cmd_status = STAT_COMPL; | |
824 | p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT; | |
825 | p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i])); | |
826 | p->xmit_buffs[i]->next = 0xffff; | |
827 | p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i])); | |
828 | } | |
829 | ||
830 | p->xmit_count = 0; | |
831 | p->xmit_last = 0; | |
832 | #ifndef NO_NOPCOMMANDS | |
833 | p->nop_point = 0; | |
834 | #endif | |
835 | ||
836 | /* | |
837 | * 'start transmitter' (nop-loop) | |
838 | */ | |
839 | #ifndef NO_NOPCOMMANDS | |
840 | p->scb->cbl_offset = make16(p->nop_cmds[0]); | |
841 | p->scb->cmd = CUC_START; | |
842 | elmc_id_attn586(); | |
843 | WAIT_4_SCB_CMD(); | |
844 | #else | |
845 | p->xmit_cmds[0]->cmd_link = 0xffff; | |
846 | p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT; | |
847 | #endif | |
848 | ||
849 | return 0; | |
850 | } | |
851 | ||
852 | /****************************************************** | |
853 | * This is a helper routine for elmc_rnr_int() and init586(). | |
854 | * It sets up the Receive Frame Area (RFA). | |
855 | */ | |
856 | ||
857 | static void *alloc_rfa(struct net_device *dev, void *ptr) | |
858 | { | |
859 | volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr; | |
860 | volatile struct rbd_struct *rbd; | |
861 | int i; | |
862 | struct priv *p = (struct priv *) dev->priv; | |
863 | ||
864 | memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs); | |
865 | p->rfd_first = rfd; | |
866 | ||
867 | for (i = 0; i < p->num_recv_buffs; i++) { | |
868 | rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs); | |
869 | } | |
870 | rfd[p->num_recv_buffs - 1].last = RFD_SUSP; /* RU suspend */ | |
871 | ||
872 | ptr = (void *) (rfd + p->num_recv_buffs); | |
873 | ||
874 | rbd = (struct rbd_struct *) ptr; | |
875 | ptr = (void *) (rbd + p->num_recv_buffs); | |
876 | ||
877 | /* clr descriptors */ | |
878 | memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs); | |
879 | ||
880 | for (i = 0; i < p->num_recv_buffs; i++) { | |
881 | rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs)); | |
882 | rbd[i].size = RECV_BUFF_SIZE; | |
883 | rbd[i].buffer = make24(ptr); | |
884 | ptr = (char *) ptr + RECV_BUFF_SIZE; | |
885 | } | |
886 | ||
887 | p->rfd_top = p->rfd_first; | |
888 | p->rfd_last = p->rfd_first + p->num_recv_buffs - 1; | |
889 | ||
890 | p->scb->rfa_offset = make16(p->rfd_first); | |
891 | p->rfd_first->rbd_offset = make16(rbd); | |
892 | ||
893 | return ptr; | |
894 | } | |
895 | ||
896 | ||
897 | /************************************************** | |
898 | * Interrupt Handler ... | |
899 | */ | |
900 | ||
901 | static irqreturn_t | |
902 | elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr) | |
903 | { | |
904 | struct net_device *dev = (struct net_device *) dev_id; | |
905 | unsigned short stat; | |
906 | struct priv *p; | |
907 | ||
908 | if (dev == NULL) { | |
909 | printk(KERN_ERR "elmc-interrupt: irq %d for unknown device.\n", (int) -(((struct pt_regs *) reg_ptr)->orig_eax + 2)); | |
910 | return IRQ_NONE; | |
911 | } else if (!netif_running(dev)) { | |
912 | /* The 3c523 has this habit of generating interrupts during the | |
913 | reset. I'm not sure if the ni52 has this same problem, but it's | |
914 | really annoying if we haven't finished initializing it. I was | |
915 | hoping all the elmc_id_* commands would disable this, but I | |
916 | might have missed a few. */ | |
917 | ||
918 | elmc_id_attn586(); /* ack inter. and disable any more */ | |
919 | return IRQ_HANDLED; | |
920 | } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) { | |
921 | /* wasn't this device */ | |
922 | return IRQ_NONE; | |
923 | } | |
924 | /* reading ELMC_CTRL also clears the INT bit. */ | |
925 | ||
926 | p = (struct priv *) dev->priv; | |
927 | ||
928 | while ((stat = p->scb->status & STAT_MASK)) | |
929 | { | |
930 | p->scb->cmd = stat; | |
931 | elmc_attn586(); /* ack inter. */ | |
932 | ||
933 | if (stat & STAT_CX) { | |
934 | /* command with I-bit set complete */ | |
935 | elmc_xmt_int(dev); | |
936 | } | |
937 | if (stat & STAT_FR) { | |
938 | /* received a frame */ | |
939 | elmc_rcv_int(dev); | |
940 | } | |
941 | #ifndef NO_NOPCOMMANDS | |
942 | if (stat & STAT_CNA) { | |
943 | /* CU went 'not ready' */ | |
944 | if (netif_running(dev)) { | |
945 | printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status); | |
946 | } | |
947 | } | |
948 | #endif | |
949 | ||
950 | if (stat & STAT_RNR) { | |
951 | /* RU went 'not ready' */ | |
952 | ||
953 | if (p->scb->status & RU_SUSPEND) { | |
954 | /* special case: RU_SUSPEND */ | |
955 | ||
956 | WAIT_4_SCB_CMD(); | |
957 | p->scb->cmd = RUC_RESUME; | |
958 | elmc_attn586(); | |
959 | } else { | |
960 | printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status); | |
961 | elmc_rnr_int(dev); | |
962 | } | |
963 | } | |
964 | WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */ | |
965 | if (p->scb->cmd) { /* timed out? */ | |
966 | break; | |
967 | } | |
968 | } | |
969 | return IRQ_HANDLED; | |
970 | } | |
971 | ||
972 | /******************************************************* | |
973 | * receive-interrupt | |
974 | */ | |
975 | ||
976 | static void elmc_rcv_int(struct net_device *dev) | |
977 | { | |
978 | int status; | |
979 | unsigned short totlen; | |
980 | struct sk_buff *skb; | |
981 | struct rbd_struct *rbd; | |
982 | struct priv *p = (struct priv *) dev->priv; | |
983 | ||
984 | for (; (status = p->rfd_top->status) & STAT_COMPL;) { | |
985 | rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset); | |
986 | ||
987 | if (status & STAT_OK) { /* frame received without error? */ | |
988 | if ((totlen = rbd->status) & RBD_LAST) { /* the first and the last buffer? */ | |
989 | totlen &= RBD_MASK; /* length of this frame */ | |
990 | rbd->status = 0; | |
991 | skb = (struct sk_buff *) dev_alloc_skb(totlen + 2); | |
992 | if (skb != NULL) { | |
993 | skb->dev = dev; | |
994 | skb_reserve(skb, 2); /* 16 byte alignment */ | |
995 | skb_put(skb,totlen); | |
996 | eth_copy_and_sum(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen,0); | |
997 | skb->protocol = eth_type_trans(skb, dev); | |
998 | netif_rx(skb); | |
999 | dev->last_rx = jiffies; | |
1000 | p->stats.rx_packets++; | |
1001 | p->stats.rx_bytes += totlen; | |
1002 | } else { | |
1003 | p->stats.rx_dropped++; | |
1004 | } | |
1005 | } else { | |
1006 | printk(KERN_WARNING "%s: received oversized frame.\n", dev->name); | |
1007 | p->stats.rx_dropped++; | |
1008 | } | |
1009 | } else { /* frame !(ok), only with 'save-bad-frames' */ | |
1010 | printk(KERN_WARNING "%s: oops! rfd-error-status: %04x\n", dev->name, status); | |
1011 | p->stats.rx_errors++; | |
1012 | } | |
1013 | p->rfd_top->status = 0; | |
1014 | p->rfd_top->last = RFD_SUSP; | |
1015 | p->rfd_last->last = 0; /* delete RU_SUSP */ | |
1016 | p->rfd_last = p->rfd_top; | |
1017 | p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */ | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | /********************************************************** | |
1022 | * handle 'Receiver went not ready'. | |
1023 | */ | |
1024 | ||
1025 | static void elmc_rnr_int(struct net_device *dev) | |
1026 | { | |
1027 | struct priv *p = (struct priv *) dev->priv; | |
1028 | ||
1029 | p->stats.rx_errors++; | |
1030 | ||
1031 | WAIT_4_SCB_CMD(); /* wait for the last cmd */ | |
1032 | p->scb->cmd = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */ | |
1033 | elmc_attn586(); | |
1034 | WAIT_4_SCB_CMD(); /* wait for accept cmd. */ | |
1035 | ||
1036 | alloc_rfa(dev, (char *) p->rfd_first); | |
1037 | startrecv586(dev); /* restart RU */ | |
1038 | ||
1039 | printk(KERN_WARNING "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status); | |
1040 | ||
1041 | } | |
1042 | ||
1043 | /********************************************************** | |
1044 | * handle xmit - interrupt | |
1045 | */ | |
1046 | ||
1047 | static void elmc_xmt_int(struct net_device *dev) | |
1048 | { | |
1049 | int status; | |
1050 | struct priv *p = (struct priv *) dev->priv; | |
1051 | ||
1052 | status = p->xmit_cmds[p->xmit_last]->cmd_status; | |
1053 | if (!(status & STAT_COMPL)) { | |
1054 | printk(KERN_WARNING "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name); | |
1055 | } | |
1056 | if (status & STAT_OK) { | |
1057 | p->stats.tx_packets++; | |
1058 | p->stats.collisions += (status & TCMD_MAXCOLLMASK); | |
1059 | } else { | |
1060 | p->stats.tx_errors++; | |
1061 | if (status & TCMD_LATECOLL) { | |
1062 | printk(KERN_WARNING "%s: late collision detected.\n", dev->name); | |
1063 | p->stats.collisions++; | |
1064 | } else if (status & TCMD_NOCARRIER) { | |
1065 | p->stats.tx_carrier_errors++; | |
1066 | printk(KERN_WARNING "%s: no carrier detected.\n", dev->name); | |
1067 | } else if (status & TCMD_LOSTCTS) { | |
1068 | printk(KERN_WARNING "%s: loss of CTS detected.\n", dev->name); | |
1069 | } else if (status & TCMD_UNDERRUN) { | |
1070 | p->stats.tx_fifo_errors++; | |
1071 | printk(KERN_WARNING "%s: DMA underrun detected.\n", dev->name); | |
1072 | } else if (status & TCMD_MAXCOLL) { | |
1073 | printk(KERN_WARNING "%s: Max. collisions exceeded.\n", dev->name); | |
1074 | p->stats.collisions += 16; | |
1075 | } | |
1076 | } | |
1077 | ||
1078 | #if (NUM_XMIT_BUFFS != 1) | |
1079 | if ((++p->xmit_last) == NUM_XMIT_BUFFS) { | |
1080 | p->xmit_last = 0; | |
1081 | } | |
1082 | #endif | |
1083 | ||
1084 | netif_wake_queue(dev); | |
1085 | } | |
1086 | ||
1087 | /*********************************************************** | |
1088 | * (re)start the receiver | |
1089 | */ | |
1090 | ||
1091 | static void startrecv586(struct net_device *dev) | |
1092 | { | |
1093 | struct priv *p = (struct priv *) dev->priv; | |
1094 | ||
1095 | p->scb->rfa_offset = make16(p->rfd_first); | |
1096 | p->scb->cmd = RUC_START; | |
1097 | elmc_attn586(); /* start cmd. */ | |
1098 | WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */ | |
1099 | } | |
1100 | ||
1101 | /****************************************************** | |
1102 | * timeout | |
1103 | */ | |
1104 | ||
1105 | static void elmc_timeout(struct net_device *dev) | |
1106 | { | |
1107 | struct priv *p = (struct priv *) dev->priv; | |
1108 | /* COMMAND-UNIT active? */ | |
1109 | if (p->scb->status & CU_ACTIVE) { | |
1110 | #ifdef DEBUG | |
1111 | printk("%s: strange ... timeout with CU active?!?\n", dev->name); | |
1112 | printk("%s: X0: %04x N0: %04x N1: %04x %d\n", dev->name, (int) p->xmit_cmds[0]->cmd_status, (int) p->nop_cmds[0]->cmd_status, (int) p->nop_cmds[1]->cmd_status, (int) p->nop_point); | |
1113 | #endif | |
1114 | p->scb->cmd = CUC_ABORT; | |
1115 | elmc_attn586(); | |
1116 | WAIT_4_SCB_CMD(); | |
1117 | p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]); | |
1118 | p->scb->cmd = CUC_START; | |
1119 | elmc_attn586(); | |
1120 | WAIT_4_SCB_CMD(); | |
1121 | netif_wake_queue(dev); | |
1122 | } else { | |
1123 | #ifdef DEBUG | |
1124 | printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev->name, p->scb->status); | |
1125 | printk("%s: command-stats: %04x %04x\n", dev->name, p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status); | |
1126 | #endif | |
1127 | elmc_close(dev); | |
1128 | elmc_open(dev); | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | /****************************************************** | |
1133 | * send frame | |
1134 | */ | |
1135 | ||
1136 | static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev) | |
1137 | { | |
1138 | int len; | |
1139 | int i; | |
1140 | #ifndef NO_NOPCOMMANDS | |
1141 | int next_nop; | |
1142 | #endif | |
1143 | struct priv *p = (struct priv *) dev->priv; | |
1144 | ||
1145 | netif_stop_queue(dev); | |
1146 | ||
1147 | len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN; | |
1148 | ||
1149 | if (len != skb->len) | |
1150 | memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN); | |
1151 | memcpy((char *) p->xmit_cbuffs[p->xmit_count], (char *) (skb->data), skb->len); | |
1152 | ||
1153 | #if (NUM_XMIT_BUFFS == 1) | |
1154 | #ifdef NO_NOPCOMMANDS | |
1155 | p->xmit_buffs[0]->size = TBD_LAST | len; | |
1156 | for (i = 0; i < 16; i++) { | |
1157 | p->scb->cbl_offset = make16(p->xmit_cmds[0]); | |
1158 | p->scb->cmd = CUC_START; | |
1159 | p->xmit_cmds[0]->cmd_status = 0; | |
1160 | elmc_attn586(); | |
1161 | dev->trans_start = jiffies; | |
1162 | if (!i) { | |
1163 | dev_kfree_skb(skb); | |
1164 | } | |
1165 | WAIT_4_SCB_CMD(); | |
1166 | if ((p->scb->status & CU_ACTIVE)) { /* test it, because CU sometimes doesn't start immediately */ | |
1167 | break; | |
1168 | } | |
1169 | if (p->xmit_cmds[0]->cmd_status) { | |
1170 | break; | |
1171 | } | |
1172 | if (i == 15) { | |
1173 | printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name); | |
1174 | } | |
1175 | } | |
1176 | #else | |
1177 | next_nop = (p->nop_point + 1) & 0x1; | |
1178 | p->xmit_buffs[0]->size = TBD_LAST | len; | |
1179 | ||
1180 | p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link | |
1181 | = make16((p->nop_cmds[next_nop])); | |
1182 | p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0; | |
1183 | ||
1184 | p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0])); | |
1185 | dev->trans_start = jiffies; | |
1186 | p->nop_point = next_nop; | |
1187 | dev_kfree_skb(skb); | |
1188 | #endif | |
1189 | #else | |
1190 | p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len; | |
1191 | if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) { | |
1192 | next_nop = 0; | |
1193 | } | |
1194 | p->xmit_cmds[p->xmit_count]->cmd_status = 0; | |
1195 | p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link | |
1196 | = make16((p->nop_cmds[next_nop])); | |
1197 | p->nop_cmds[next_nop]->cmd_status = 0; | |
1198 | p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count])); | |
1199 | dev->trans_start = jiffies; | |
1200 | p->xmit_count = next_nop; | |
1201 | if (p->xmit_count != p->xmit_last) | |
1202 | netif_wake_queue(dev); | |
1203 | dev_kfree_skb(skb); | |
1204 | #endif | |
1205 | return 0; | |
1206 | } | |
1207 | ||
1208 | /******************************************* | |
1209 | * Someone wanna have the statistics | |
1210 | */ | |
1211 | ||
1212 | static struct net_device_stats *elmc_get_stats(struct net_device *dev) | |
1213 | { | |
1214 | struct priv *p = (struct priv *) dev->priv; | |
1215 | unsigned short crc, aln, rsc, ovrn; | |
1216 | ||
1217 | crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */ | |
1218 | p->scb->crc_errs -= crc; | |
1219 | aln = p->scb->aln_errs; | |
1220 | p->scb->aln_errs -= aln; | |
1221 | rsc = p->scb->rsc_errs; | |
1222 | p->scb->rsc_errs -= rsc; | |
1223 | ovrn = p->scb->ovrn_errs; | |
1224 | p->scb->ovrn_errs -= ovrn; | |
1225 | ||
1226 | p->stats.rx_crc_errors += crc; | |
1227 | p->stats.rx_fifo_errors += ovrn; | |
1228 | p->stats.rx_frame_errors += aln; | |
1229 | p->stats.rx_dropped += rsc; | |
1230 | ||
1231 | return &p->stats; | |
1232 | } | |
1233 | ||
1234 | /******************************************************** | |
1235 | * Set MC list .. | |
1236 | */ | |
1237 | ||
1238 | #ifdef ELMC_MULTICAST | |
1239 | static void set_multicast_list(struct net_device *dev) | |
1240 | { | |
1241 | if (!dev->start) { | |
1242 | /* without a running interface, promiscuous doesn't work */ | |
1243 | return; | |
1244 | } | |
1245 | dev->start = 0; | |
1246 | alloc586(dev); | |
1247 | init586(dev); | |
1248 | startrecv586(dev); | |
1249 | dev->start = 1; | |
1250 | } | |
1251 | #endif | |
1252 | ||
1253 | static void netdev_get_drvinfo(struct net_device *dev, | |
1254 | struct ethtool_drvinfo *info) | |
1255 | { | |
1256 | strcpy(info->driver, DRV_NAME); | |
1257 | strcpy(info->version, DRV_VERSION); | |
1258 | sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr); | |
1259 | } | |
1260 | ||
1261 | static struct ethtool_ops netdev_ethtool_ops = { | |
1262 | .get_drvinfo = netdev_get_drvinfo, | |
1263 | }; | |
1264 | ||
1265 | #ifdef MODULE | |
1266 | ||
1267 | /* Increase if needed ;) */ | |
1268 | #define MAX_3C523_CARDS 4 | |
1269 | ||
1270 | static struct net_device *dev_elmc[MAX_3C523_CARDS]; | |
1271 | static int irq[MAX_3C523_CARDS]; | |
1272 | static int io[MAX_3C523_CARDS]; | |
1273 | module_param_array(irq, int, NULL, 0); | |
1274 | module_param_array(io, int, NULL, 0); | |
1275 | MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)"); | |
1276 | MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)"); | |
7b24017e | 1277 | MODULE_LICENSE("GPL"); |
1da177e4 LT |
1278 | |
1279 | int init_module(void) | |
1280 | { | |
1281 | int this_dev,found = 0; | |
1282 | ||
1283 | /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */ | |
1284 | for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) { | |
1285 | struct net_device *dev = alloc_etherdev(sizeof(struct priv)); | |
1286 | if (!dev) | |
1287 | break; | |
1288 | dev->irq=irq[this_dev]; | |
1289 | dev->base_addr=io[this_dev]; | |
1290 | if (do_elmc_probe(dev) == 0) { | |
b1fc5505 | 1291 | dev_elmc[this_dev] = dev; |
1292 | found++; | |
1293 | continue; | |
1da177e4 LT |
1294 | } |
1295 | free_netdev(dev); | |
1296 | if (io[this_dev]==0) | |
1297 | break; | |
1298 | printk(KERN_WARNING "3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]); | |
1299 | } | |
1300 | ||
1301 | if(found==0) { | |
1302 | if(io[0]==0) printk(KERN_NOTICE "3c523.c: No 3c523 cards found\n"); | |
1303 | return -ENXIO; | |
1304 | } else return 0; | |
1305 | } | |
1306 | ||
1307 | void cleanup_module(void) | |
1308 | { | |
1309 | int this_dev; | |
1310 | for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) { | |
1311 | struct net_device *dev = dev_elmc[this_dev]; | |
1312 | if (dev) { | |
1313 | unregister_netdev(dev); | |
1314 | cleanup_card(dev); | |
1315 | free_netdev(dev); | |
1316 | } | |
1317 | } | |
1318 | } | |
1319 | ||
1320 | #endif /* MODULE */ |