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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> | |
ff5688ae | 108 | #include <linux/jiffies.h> |
1da177e4 LT |
109 | |
110 | #include <asm/uaccess.h> | |
111 | #include <asm/processor.h> | |
112 | #include <asm/io.h> | |
113 | ||
114 | #include "3c523.h" | |
115 | ||
116 | /*************************************************************************/ | |
117 | #define DEBUG /* debug on */ | |
118 | #define SYSBUSVAL 0 /* 1 = 8 Bit, 0 = 16 bit - 3c523 only does 16 bit */ | |
119 | #undef ELMC_MULTICAST /* Disable multicast support as it is somewhat seriously broken at the moment */ | |
120 | ||
121 | #define make32(ptr16) (p->memtop + (short) (ptr16) ) | |
122 | #define make24(ptr32) ((char *) (ptr32) - p->base) | |
123 | #define make16(ptr32) ((unsigned short) ((unsigned long) (ptr32) - (unsigned long) p->memtop )) | |
124 | ||
125 | /*************************************************************************/ | |
126 | /* | |
127 | Tables to which we can map values in the configuration registers. | |
128 | */ | |
129 | static int irq_table[] __initdata = { | |
130 | 12, 7, 3, 9 | |
131 | }; | |
132 | ||
133 | static int csr_table[] __initdata = { | |
134 | 0x300, 0x1300, 0x2300, 0x3300 | |
135 | }; | |
136 | ||
137 | static int shm_table[] __initdata = { | |
138 | 0x0c0000, 0x0c8000, 0x0d0000, 0x0d8000 | |
139 | }; | |
140 | ||
141 | /******************* how to calculate the buffers ***************************** | |
142 | ||
143 | ||
144 | * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works | |
145 | * --------------- in a different (more stable?) mode. Only in this mode it's | |
146 | * possible to configure the driver with 'NO_NOPCOMMANDS' | |
147 | ||
148 | sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8; | |
149 | sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT | |
150 | sizeof(rfd) = 24; sizeof(rbd) = 12; | |
151 | sizeof(tbd) = 8; sizeof(transmit_cmd) = 16; | |
152 | sizeof(nop_cmd) = 8; | |
153 | ||
154 | * if you don't know the driver, better do not change this values: */ | |
155 | ||
156 | #define RECV_BUFF_SIZE 1524 /* slightly oversized */ | |
157 | #define XMIT_BUFF_SIZE 1524 /* slightly oversized */ | |
158 | #define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */ | |
159 | #define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */ | |
160 | #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */ | |
161 | ||
162 | #if (NUM_XMIT_BUFFS == 1) | |
163 | #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */ | |
164 | #endif | |
165 | ||
166 | /**************************************************************************/ | |
167 | ||
168 | #define DELAY(x) { mdelay(32 * x); } | |
169 | ||
170 | /* a much shorter delay: */ | |
171 | #define DELAY_16(); { udelay(16) ; } | |
172 | ||
173 | /* wait for command with timeout: */ | |
174 | #define WAIT_4_SCB_CMD() { int i; \ | |
175 | for(i=0;i<1024;i++) { \ | |
176 | if(!p->scb->cmd) break; \ | |
177 | DELAY_16(); \ | |
178 | if(i == 1023) { \ | |
179 | printk(KERN_WARNING "%s:%d: scb_cmd timed out .. resetting i82586\n",\ | |
180 | dev->name,__LINE__); \ | |
181 | elmc_id_reset586(); } } } | |
182 | ||
183 | static irqreturn_t elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr); | |
184 | static int elmc_open(struct net_device *dev); | |
185 | static int elmc_close(struct net_device *dev); | |
186 | static int elmc_send_packet(struct sk_buff *, struct net_device *); | |
187 | static struct net_device_stats *elmc_get_stats(struct net_device *dev); | |
188 | static void elmc_timeout(struct net_device *dev); | |
189 | #ifdef ELMC_MULTICAST | |
190 | static void set_multicast_list(struct net_device *dev); | |
191 | #endif | |
192 | static struct ethtool_ops netdev_ethtool_ops; | |
193 | ||
194 | /* helper-functions */ | |
195 | static int init586(struct net_device *dev); | |
196 | static int check586(struct net_device *dev, unsigned long where, unsigned size); | |
197 | static void alloc586(struct net_device *dev); | |
198 | static void startrecv586(struct net_device *dev); | |
199 | static void *alloc_rfa(struct net_device *dev, void *ptr); | |
200 | static void elmc_rcv_int(struct net_device *dev); | |
201 | static void elmc_xmt_int(struct net_device *dev); | |
202 | static void elmc_rnr_int(struct net_device *dev); | |
203 | ||
204 | struct priv { | |
205 | struct net_device_stats stats; | |
206 | unsigned long base; | |
207 | char *memtop; | |
208 | unsigned long mapped_start; /* Start of ioremap */ | |
209 | volatile struct rfd_struct *rfd_last, *rfd_top, *rfd_first; | |
210 | volatile struct scp_struct *scp; /* volatile is important */ | |
211 | volatile struct iscp_struct *iscp; /* volatile is important */ | |
212 | volatile struct scb_struct *scb; /* volatile is important */ | |
213 | volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS]; | |
214 | #if (NUM_XMIT_BUFFS == 1) | |
215 | volatile struct transmit_cmd_struct *xmit_cmds[2]; | |
216 | volatile struct nop_cmd_struct *nop_cmds[2]; | |
217 | #else | |
218 | volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS]; | |
219 | volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS]; | |
220 | #endif | |
221 | volatile int nop_point, num_recv_buffs; | |
222 | volatile char *xmit_cbuffs[NUM_XMIT_BUFFS]; | |
223 | volatile int xmit_count, xmit_last; | |
224 | volatile int slot; | |
225 | }; | |
226 | ||
227 | #define elmc_attn586() {elmc_do_attn586(dev->base_addr,ELMC_CTRL_INTE);} | |
228 | #define elmc_reset586() {elmc_do_reset586(dev->base_addr,ELMC_CTRL_INTE);} | |
229 | ||
230 | /* with interrupts disabled - this will clear the interrupt bit in the | |
231 | 3c523 control register, and won't put it back. This effectively | |
232 | disables interrupts on the card. */ | |
233 | #define elmc_id_attn586() {elmc_do_attn586(dev->base_addr,0);} | |
234 | #define elmc_id_reset586() {elmc_do_reset586(dev->base_addr,0);} | |
235 | ||
236 | /*************************************************************************/ | |
237 | /* | |
238 | Do a Channel Attention on the 3c523. This is extremely board dependent. | |
239 | */ | |
240 | static void elmc_do_attn586(int ioaddr, int ints) | |
241 | { | |
242 | /* the 3c523 requires a minimum of 500 ns. The delays here might be | |
243 | a little too large, and hence they may cut the performance of the | |
244 | card slightly. If someone who knows a little more about Linux | |
245 | timing would care to play with these, I'd appreciate it. */ | |
246 | ||
247 | /* this bit masking stuff is crap. I'd rather have separate | |
248 | registers with strobe triggers for each of these functions. <sigh> | |
249 | Ya take what ya got. */ | |
250 | ||
251 | outb(ELMC_CTRL_RST | 0x3 | ELMC_CTRL_CA | ints, ioaddr + ELMC_CTRL); | |
252 | DELAY_16(); /* > 500 ns */ | |
253 | outb(ELMC_CTRL_RST | 0x3 | ints, ioaddr + ELMC_CTRL); | |
254 | } | |
255 | ||
256 | /*************************************************************************/ | |
257 | /* | |
258 | Reset the 82586 on the 3c523. Also very board dependent. | |
259 | */ | |
260 | static void elmc_do_reset586(int ioaddr, int ints) | |
261 | { | |
262 | /* toggle the RST bit low then high */ | |
263 | outb(0x3 | ELMC_CTRL_LBK, ioaddr + ELMC_CTRL); | |
264 | DELAY_16(); /* > 500 ns */ | |
265 | outb(ELMC_CTRL_RST | ELMC_CTRL_LBK | 0x3, ioaddr + ELMC_CTRL); | |
266 | ||
267 | elmc_do_attn586(ioaddr, ints); | |
268 | } | |
269 | ||
270 | /********************************************** | |
271 | * close device | |
272 | */ | |
273 | ||
274 | static int elmc_close(struct net_device *dev) | |
275 | { | |
276 | netif_stop_queue(dev); | |
277 | elmc_id_reset586(); /* the hard way to stop the receiver */ | |
278 | free_irq(dev->irq, dev); | |
279 | return 0; | |
280 | } | |
281 | ||
282 | /********************************************** | |
283 | * open device | |
284 | */ | |
285 | ||
286 | static int elmc_open(struct net_device *dev) | |
287 | { | |
288 | int ret; | |
289 | ||
290 | elmc_id_attn586(); /* disable interrupts */ | |
291 | ||
292 | ret = request_irq(dev->irq, &elmc_interrupt, SA_SHIRQ | SA_SAMPLE_RANDOM, | |
293 | dev->name, dev); | |
294 | if (ret) { | |
295 | printk(KERN_ERR "%s: couldn't get irq %d\n", dev->name, dev->irq); | |
296 | elmc_id_reset586(); | |
297 | return ret; | |
298 | } | |
299 | alloc586(dev); | |
300 | init586(dev); | |
301 | startrecv586(dev); | |
302 | netif_start_queue(dev); | |
303 | return 0; /* most done by init */ | |
304 | } | |
305 | ||
306 | /********************************************** | |
307 | * Check to see if there's an 82586 out there. | |
308 | */ | |
309 | ||
310 | static int __init check586(struct net_device *dev, unsigned long where, unsigned size) | |
311 | { | |
312 | struct priv *p = (struct priv *) dev->priv; | |
313 | char *iscp_addrs[2]; | |
314 | int i = 0; | |
315 | ||
316 | p->base = (unsigned long) isa_bus_to_virt((unsigned long)where) + size - 0x01000000; | |
317 | p->memtop = isa_bus_to_virt((unsigned long)where) + size; | |
318 | p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS); | |
319 | memset((char *) p->scp, 0, sizeof(struct scp_struct)); | |
320 | p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */ | |
321 | ||
322 | iscp_addrs[0] = isa_bus_to_virt((unsigned long)where); | |
323 | iscp_addrs[1] = (char *) p->scp - sizeof(struct iscp_struct); | |
324 | ||
325 | for (i = 0; i < 2; i++) { | |
326 | p->iscp = (struct iscp_struct *) iscp_addrs[i]; | |
327 | memset((char *) p->iscp, 0, sizeof(struct iscp_struct)); | |
328 | ||
329 | p->scp->iscp = make24(p->iscp); | |
330 | p->iscp->busy = 1; | |
331 | ||
332 | elmc_id_reset586(); | |
333 | ||
334 | /* reset586 does an implicit CA */ | |
335 | ||
336 | /* apparently, you sometimes have to kick the 82586 twice... */ | |
337 | elmc_id_attn586(); | |
338 | DELAY(1); | |
339 | ||
340 | if (p->iscp->busy) { /* i82586 clears 'busy' after successful init */ | |
341 | return 0; | |
342 | } | |
343 | } | |
344 | return 1; | |
345 | } | |
346 | ||
347 | /****************************************************************** | |
348 | * set iscp at the right place, called by elmc_probe and open586. | |
349 | */ | |
350 | ||
351 | void alloc586(struct net_device *dev) | |
352 | { | |
353 | struct priv *p = (struct priv *) dev->priv; | |
354 | ||
355 | elmc_id_reset586(); | |
356 | DELAY(2); | |
357 | ||
358 | p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS); | |
359 | p->scb = (struct scb_struct *) isa_bus_to_virt(dev->mem_start); | |
360 | p->iscp = (struct iscp_struct *) ((char *) p->scp - sizeof(struct iscp_struct)); | |
361 | ||
362 | memset((char *) p->iscp, 0, sizeof(struct iscp_struct)); | |
363 | memset((char *) p->scp, 0, sizeof(struct scp_struct)); | |
364 | ||
365 | p->scp->iscp = make24(p->iscp); | |
366 | p->scp->sysbus = SYSBUSVAL; | |
367 | p->iscp->scb_offset = make16(p->scb); | |
368 | ||
369 | p->iscp->busy = 1; | |
370 | elmc_id_reset586(); | |
371 | elmc_id_attn586(); | |
372 | ||
373 | DELAY(2); | |
374 | ||
375 | if (p->iscp->busy) { | |
376 | printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name); | |
377 | } | |
378 | memset((char *) p->scb, 0, sizeof(struct scb_struct)); | |
379 | } | |
380 | ||
381 | /*****************************************************************/ | |
382 | ||
383 | static int elmc_getinfo(char *buf, int slot, void *d) | |
384 | { | |
385 | int len = 0; | |
386 | struct net_device *dev = (struct net_device *) d; | |
387 | int i; | |
388 | ||
389 | if (dev == NULL) | |
390 | return len; | |
391 | ||
392 | len += sprintf(buf + len, "Revision: 0x%x\n", | |
393 | inb(dev->base_addr + ELMC_REVISION) & 0xf); | |
394 | len += sprintf(buf + len, "IRQ: %d\n", dev->irq); | |
395 | len += sprintf(buf + len, "IO Address: %#lx-%#lx\n", dev->base_addr, | |
396 | dev->base_addr + ELMC_IO_EXTENT); | |
397 | len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start, | |
398 | dev->mem_end - 1); | |
399 | len += sprintf(buf + len, "Transceiver: %s\n", dev->if_port ? | |
400 | "External" : "Internal"); | |
401 | len += sprintf(buf + len, "Device: %s\n", dev->name); | |
402 | len += sprintf(buf + len, "Hardware Address:"); | |
403 | for (i = 0; i < 6; i++) { | |
404 | len += sprintf(buf + len, " %02x", dev->dev_addr[i]); | |
405 | } | |
406 | buf[len++] = '\n'; | |
407 | buf[len] = 0; | |
408 | ||
409 | return len; | |
410 | } /* elmc_getinfo() */ | |
411 | ||
412 | /*****************************************************************/ | |
413 | ||
414 | static int __init do_elmc_probe(struct net_device *dev) | |
415 | { | |
416 | static int slot; | |
417 | int base_addr = dev->base_addr; | |
418 | int irq = dev->irq; | |
419 | u_char status = 0; | |
420 | u_char revision = 0; | |
421 | int i = 0; | |
422 | unsigned int size = 0; | |
423 | int retval; | |
424 | struct priv *pr = dev->priv; | |
425 | ||
426 | SET_MODULE_OWNER(dev); | |
427 | if (MCA_bus == 0) { | |
428 | return -ENODEV; | |
429 | } | |
430 | /* search through the slots for the 3c523. */ | |
431 | slot = mca_find_adapter(ELMC_MCA_ID, 0); | |
432 | while (slot != -1) { | |
433 | status = mca_read_stored_pos(slot, 2); | |
434 | ||
435 | dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6]; | |
436 | dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1]; | |
437 | ||
438 | /* | |
439 | If we're trying to match a specified irq or IO address, | |
440 | we'll reject a match unless it's what we're looking for. | |
441 | Also reject it if the card is already in use. | |
442 | */ | |
443 | ||
444 | if ((irq && irq != dev->irq) || | |
445 | (base_addr && base_addr != dev->base_addr)) { | |
446 | slot = mca_find_adapter(ELMC_MCA_ID, slot + 1); | |
447 | continue; | |
448 | } | |
449 | if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) { | |
450 | slot = mca_find_adapter(ELMC_MCA_ID, slot + 1); | |
451 | continue; | |
452 | } | |
453 | ||
454 | /* found what we're looking for... */ | |
455 | break; | |
456 | } | |
457 | ||
458 | /* we didn't find any 3c523 in the slots we checked for */ | |
459 | if (slot == MCA_NOTFOUND) | |
460 | return ((base_addr || irq) ? -ENXIO : -ENODEV); | |
461 | ||
462 | mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC"); | |
463 | mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev); | |
464 | ||
465 | /* if we get this far, adapter has been found - carry on */ | |
466 | printk(KERN_INFO "%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1); | |
467 | ||
468 | /* Now we extract configuration info from the card. | |
469 | The 3c523 provides information in two of the POS registers, but | |
470 | the second one is only needed if we want to tell the card what IRQ | |
471 | to use. I suspect that whoever sets the thing up initially would | |
472 | prefer we don't screw with those things. | |
473 | ||
474 | Note that we read the status info when we found the card... | |
475 | ||
476 | See 3c523.h for more details. | |
477 | */ | |
478 | ||
479 | /* revision is stored in the first 4 bits of the revision register */ | |
480 | revision = inb(dev->base_addr + ELMC_REVISION) & 0xf; | |
481 | ||
482 | /* according to docs, we read the interrupt and write it back to | |
483 | the IRQ select register, since the POST might not configure the IRQ | |
484 | properly. */ | |
485 | switch (dev->irq) { | |
486 | case 3: | |
487 | mca_write_pos(slot, 3, 0x04); | |
488 | break; | |
489 | case 7: | |
490 | mca_write_pos(slot, 3, 0x02); | |
491 | break; | |
492 | case 9: | |
493 | mca_write_pos(slot, 3, 0x08); | |
494 | break; | |
495 | case 12: | |
496 | mca_write_pos(slot, 3, 0x01); | |
497 | break; | |
498 | } | |
499 | ||
500 | memset(pr, 0, sizeof(struct priv)); | |
501 | pr->slot = slot; | |
502 | ||
503 | printk(KERN_INFO "%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision, | |
504 | dev->base_addr); | |
505 | ||
506 | /* Determine if we're using the on-board transceiver (i.e. coax) or | |
507 | an external one. The information is pretty much useless, but I | |
508 | guess it's worth brownie points. */ | |
509 | dev->if_port = (status & ELMC_STATUS_DISABLE_THIN); | |
510 | ||
511 | /* The 3c523 has a 24K chunk of memory. The first 16K is the | |
512 | shared memory, while the last 8K is for the EtherStart BIOS ROM. | |
513 | Which we don't care much about here. We'll just tell Linux that | |
514 | we're using 16K. MCA won't permit address space conflicts caused | |
515 | by not mapping the other 8K. */ | |
516 | dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3]; | |
517 | ||
518 | /* We're using MCA, so it's a given that the information about memory | |
519 | size is correct. The Crynwr drivers do something like this. */ | |
520 | ||
521 | elmc_id_reset586(); /* seems like a good idea before checking it... */ | |
522 | ||
523 | size = 0x4000; /* check for 16K mem */ | |
524 | if (!check586(dev, dev->mem_start, size)) { | |
525 | printk(KERN_ERR "%s: memprobe, Can't find memory at 0x%lx!\n", dev->name, | |
526 | dev->mem_start); | |
527 | retval = -ENODEV; | |
528 | goto err_out; | |
529 | } | |
530 | dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */ | |
531 | ||
532 | pr->memtop = isa_bus_to_virt(dev->mem_start) + size; | |
533 | pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000; | |
534 | alloc586(dev); | |
535 | ||
536 | elmc_id_reset586(); /* make sure it doesn't generate spurious ints */ | |
537 | ||
538 | /* set number of receive-buffs according to memsize */ | |
539 | pr->num_recv_buffs = NUM_RECV_BUFFS_16; | |
540 | ||
541 | /* dump all the assorted information */ | |
542 | printk(KERN_INFO "%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name, | |
543 | dev->irq, dev->if_port ? "ex" : "in", | |
544 | dev->mem_start, dev->mem_end - 1); | |
545 | ||
546 | /* The hardware address for the 3c523 is stored in the first six | |
547 | bytes of the IO address. */ | |
548 | printk(KERN_INFO "%s: hardware address ", dev->name); | |
549 | for (i = 0; i < 6; i++) { | |
550 | dev->dev_addr[i] = inb(dev->base_addr + i); | |
551 | printk(" %02x", dev->dev_addr[i]); | |
552 | } | |
553 | printk("\n"); | |
554 | ||
555 | dev->open = &elmc_open; | |
556 | dev->stop = &elmc_close; | |
557 | dev->get_stats = &elmc_get_stats; | |
558 | dev->hard_start_xmit = &elmc_send_packet; | |
559 | dev->tx_timeout = &elmc_timeout; | |
560 | dev->watchdog_timeo = HZ; | |
561 | #ifdef ELMC_MULTICAST | |
562 | dev->set_multicast_list = &set_multicast_list; | |
563 | #else | |
564 | dev->set_multicast_list = NULL; | |
565 | #endif | |
566 | dev->ethtool_ops = &netdev_ethtool_ops; | |
567 | ||
568 | /* note that we haven't actually requested the IRQ from the kernel. | |
569 | That gets done in elmc_open(). I'm not sure that's such a good idea, | |
570 | but it works, so I'll go with it. */ | |
571 | ||
572 | #ifndef ELMC_MULTICAST | |
573 | dev->flags&=~IFF_MULTICAST; /* Multicast doesn't work */ | |
574 | #endif | |
575 | ||
b1fc5505 HX |
576 | retval = register_netdev(dev); |
577 | if (retval) | |
578 | goto err_out; | |
579 | ||
1da177e4 LT |
580 | return 0; |
581 | err_out: | |
582 | mca_set_adapter_procfn(slot, NULL, NULL); | |
583 | release_region(dev->base_addr, ELMC_IO_EXTENT); | |
584 | return retval; | |
585 | } | |
586 | ||
587 | static void cleanup_card(struct net_device *dev) | |
588 | { | |
589 | mca_set_adapter_procfn(((struct priv *) (dev->priv))->slot, NULL, NULL); | |
590 | release_region(dev->base_addr, ELMC_IO_EXTENT); | |
591 | } | |
592 | ||
593 | #ifndef MODULE | |
594 | struct net_device * __init elmc_probe(int unit) | |
595 | { | |
596 | struct net_device *dev = alloc_etherdev(sizeof(struct priv)); | |
597 | int err; | |
598 | ||
599 | if (!dev) | |
600 | return ERR_PTR(-ENOMEM); | |
601 | ||
602 | sprintf(dev->name, "eth%d", unit); | |
603 | netdev_boot_setup_check(dev); | |
604 | ||
605 | err = do_elmc_probe(dev); | |
606 | if (err) | |
607 | goto out; | |
1da177e4 | 608 | return dev; |
1da177e4 LT |
609 | out: |
610 | free_netdev(dev); | |
611 | return ERR_PTR(err); | |
612 | } | |
613 | #endif | |
614 | ||
615 | /********************************************** | |
616 | * init the chip (elmc-interrupt should be disabled?!) | |
617 | * needs a correct 'allocated' memory | |
618 | */ | |
619 | ||
620 | static int init586(struct net_device *dev) | |
621 | { | |
622 | void *ptr; | |
623 | unsigned long s; | |
624 | int i, result = 0; | |
625 | struct priv *p = (struct priv *) dev->priv; | |
626 | volatile struct configure_cmd_struct *cfg_cmd; | |
627 | volatile struct iasetup_cmd_struct *ias_cmd; | |
628 | volatile struct tdr_cmd_struct *tdr_cmd; | |
629 | volatile struct mcsetup_cmd_struct *mc_cmd; | |
630 | struct dev_mc_list *dmi = dev->mc_list; | |
631 | int num_addrs = dev->mc_count; | |
632 | ||
633 | ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct)); | |
634 | ||
635 | cfg_cmd = (struct configure_cmd_struct *) ptr; /* configure-command */ | |
636 | cfg_cmd->cmd_status = 0; | |
637 | cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST; | |
638 | cfg_cmd->cmd_link = 0xffff; | |
639 | ||
640 | cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */ | |
641 | cfg_cmd->fifo = 0x08; /* fifo-limit (8=tx:32/rx:64) */ | |
642 | cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */ | |
643 | cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */ | |
644 | cfg_cmd->priority = 0x00; | |
645 | cfg_cmd->ifs = 0x60; | |
646 | cfg_cmd->time_low = 0x00; | |
647 | cfg_cmd->time_high = 0xf2; | |
648 | cfg_cmd->promisc = 0; | |
649 | if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC)) { | |
650 | cfg_cmd->promisc = 1; | |
651 | dev->flags |= IFF_PROMISC; | |
652 | } | |
653 | cfg_cmd->carr_coll = 0x00; | |
654 | ||
655 | p->scb->cbl_offset = make16(cfg_cmd); | |
656 | ||
657 | p->scb->cmd = CUC_START; /* cmd.-unit start */ | |
658 | elmc_id_attn586(); | |
659 | ||
660 | s = jiffies; /* warning: only active with interrupts on !! */ | |
661 | while (!(cfg_cmd->cmd_status & STAT_COMPL)) { | |
ff5688ae | 662 | if (time_after(jiffies, s + 30*HZ/100)) |
1da177e4 LT |
663 | break; |
664 | } | |
665 | ||
666 | if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) { | |
667 | printk(KERN_WARNING "%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status); | |
668 | return 1; | |
669 | } | |
670 | /* | |
671 | * individual address setup | |
672 | */ | |
673 | ias_cmd = (struct iasetup_cmd_struct *) ptr; | |
674 | ||
675 | ias_cmd->cmd_status = 0; | |
676 | ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST; | |
677 | ias_cmd->cmd_link = 0xffff; | |
678 | ||
679 | memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN); | |
680 | ||
681 | p->scb->cbl_offset = make16(ias_cmd); | |
682 | ||
683 | p->scb->cmd = CUC_START; /* cmd.-unit start */ | |
684 | elmc_id_attn586(); | |
685 | ||
686 | s = jiffies; | |
687 | while (!(ias_cmd->cmd_status & STAT_COMPL)) { | |
ff5688ae | 688 | if (time_after(jiffies, s + 30*HZ/100)) |
1da177e4 LT |
689 | break; |
690 | } | |
691 | ||
692 | if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) { | |
693 | printk(KERN_WARNING "%s (elmc): individual address setup command failed: %04x\n", dev->name, ias_cmd->cmd_status); | |
694 | return 1; | |
695 | } | |
696 | /* | |
697 | * TDR, wire check .. e.g. no resistor e.t.c | |
698 | */ | |
699 | tdr_cmd = (struct tdr_cmd_struct *) ptr; | |
700 | ||
701 | tdr_cmd->cmd_status = 0; | |
702 | tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST; | |
703 | tdr_cmd->cmd_link = 0xffff; | |
704 | tdr_cmd->status = 0; | |
705 | ||
706 | p->scb->cbl_offset = make16(tdr_cmd); | |
707 | ||
708 | p->scb->cmd = CUC_START; /* cmd.-unit start */ | |
709 | elmc_attn586(); | |
710 | ||
711 | s = jiffies; | |
712 | while (!(tdr_cmd->cmd_status & STAT_COMPL)) { | |
ff5688ae | 713 | if (time_after(jiffies, s + 30*HZ/100)) { |
1da177e4 LT |
714 | printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__); |
715 | result = 1; | |
716 | break; | |
717 | } | |
718 | } | |
719 | ||
720 | if (!result) { | |
721 | DELAY(2); /* wait for result */ | |
722 | result = tdr_cmd->status; | |
723 | ||
724 | p->scb->cmd = p->scb->status & STAT_MASK; | |
725 | elmc_id_attn586(); /* ack the interrupts */ | |
726 | ||
727 | if (result & TDR_LNK_OK) { | |
728 | /* empty */ | |
729 | } else if (result & TDR_XCVR_PRB) { | |
730 | printk(KERN_WARNING "%s: TDR: Transceiver problem!\n", dev->name); | |
731 | } else if (result & TDR_ET_OPN) { | |
732 | printk(KERN_WARNING "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK); | |
733 | } else if (result & TDR_ET_SRT) { | |
734 | if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */ | |
735 | printk(KERN_WARNING "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK); | |
736 | } else { | |
737 | printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result); | |
738 | } | |
739 | } | |
740 | /* | |
741 | * ack interrupts | |
742 | */ | |
743 | p->scb->cmd = p->scb->status & STAT_MASK; | |
744 | elmc_id_attn586(); | |
745 | ||
746 | /* | |
747 | * alloc nop/xmit-cmds | |
748 | */ | |
749 | #if (NUM_XMIT_BUFFS == 1) | |
750 | for (i = 0; i < 2; i++) { | |
751 | p->nop_cmds[i] = (struct nop_cmd_struct *) ptr; | |
752 | p->nop_cmds[i]->cmd_cmd = CMD_NOP; | |
753 | p->nop_cmds[i]->cmd_status = 0; | |
754 | p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); | |
755 | ptr = (char *) ptr + sizeof(struct nop_cmd_struct); | |
756 | } | |
757 | p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr; /* transmit cmd/buff 0 */ | |
758 | ptr = (char *) ptr + sizeof(struct transmit_cmd_struct); | |
759 | #else | |
760 | for (i = 0; i < NUM_XMIT_BUFFS; i++) { | |
761 | p->nop_cmds[i] = (struct nop_cmd_struct *) ptr; | |
762 | p->nop_cmds[i]->cmd_cmd = CMD_NOP; | |
763 | p->nop_cmds[i]->cmd_status = 0; | |
764 | p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); | |
765 | ptr = (char *) ptr + sizeof(struct nop_cmd_struct); | |
766 | p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr; /*transmit cmd/buff 0 */ | |
767 | ptr = (char *) ptr + sizeof(struct transmit_cmd_struct); | |
768 | } | |
769 | #endif | |
770 | ||
771 | ptr = alloc_rfa(dev, (void *) ptr); /* init receive-frame-area */ | |
772 | ||
773 | /* | |
774 | * Multicast setup | |
775 | */ | |
776 | ||
777 | if (dev->mc_count) { | |
778 | /* I don't understand this: do we really need memory after the init? */ | |
779 | int len = ((char *) p->iscp - (char *) ptr - 8) / 6; | |
780 | if (len <= 0) { | |
781 | printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name); | |
782 | } else { | |
783 | if (len < num_addrs) { | |
784 | num_addrs = len; | |
785 | printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n", | |
786 | dev->name, num_addrs); | |
787 | } | |
788 | mc_cmd = (struct mcsetup_cmd_struct *) ptr; | |
789 | mc_cmd->cmd_status = 0; | |
790 | mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST; | |
791 | mc_cmd->cmd_link = 0xffff; | |
792 | mc_cmd->mc_cnt = num_addrs * 6; | |
793 | for (i = 0; i < num_addrs; i++) { | |
794 | memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6); | |
795 | dmi = dmi->next; | |
796 | } | |
797 | p->scb->cbl_offset = make16(mc_cmd); | |
798 | p->scb->cmd = CUC_START; | |
799 | elmc_id_attn586(); | |
800 | s = jiffies; | |
801 | while (!(mc_cmd->cmd_status & STAT_COMPL)) { | |
ff5688ae | 802 | if (time_after(jiffies, s + 30*HZ/100)) |
1da177e4 LT |
803 | break; |
804 | } | |
805 | if (!(mc_cmd->cmd_status & STAT_COMPL)) { | |
806 | printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name); | |
807 | } | |
808 | } | |
809 | } | |
810 | /* | |
811 | * alloc xmit-buffs / init xmit_cmds | |
812 | */ | |
813 | for (i = 0; i < NUM_XMIT_BUFFS; i++) { | |
814 | p->xmit_cbuffs[i] = (char *) ptr; /* char-buffs */ | |
815 | ptr = (char *) ptr + XMIT_BUFF_SIZE; | |
816 | p->xmit_buffs[i] = (struct tbd_struct *) ptr; /* TBD */ | |
817 | ptr = (char *) ptr + sizeof(struct tbd_struct); | |
818 | if ((void *) ptr > (void *) p->iscp) { | |
819 | printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name); | |
820 | return 1; | |
821 | } | |
822 | memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct)); | |
823 | memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct)); | |
824 | p->xmit_cmds[i]->cmd_status = STAT_COMPL; | |
825 | p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT; | |
826 | p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i])); | |
827 | p->xmit_buffs[i]->next = 0xffff; | |
828 | p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i])); | |
829 | } | |
830 | ||
831 | p->xmit_count = 0; | |
832 | p->xmit_last = 0; | |
833 | #ifndef NO_NOPCOMMANDS | |
834 | p->nop_point = 0; | |
835 | #endif | |
836 | ||
837 | /* | |
838 | * 'start transmitter' (nop-loop) | |
839 | */ | |
840 | #ifndef NO_NOPCOMMANDS | |
841 | p->scb->cbl_offset = make16(p->nop_cmds[0]); | |
842 | p->scb->cmd = CUC_START; | |
843 | elmc_id_attn586(); | |
844 | WAIT_4_SCB_CMD(); | |
845 | #else | |
846 | p->xmit_cmds[0]->cmd_link = 0xffff; | |
847 | p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT; | |
848 | #endif | |
849 | ||
850 | return 0; | |
851 | } | |
852 | ||
853 | /****************************************************** | |
854 | * This is a helper routine for elmc_rnr_int() and init586(). | |
855 | * It sets up the Receive Frame Area (RFA). | |
856 | */ | |
857 | ||
858 | static void *alloc_rfa(struct net_device *dev, void *ptr) | |
859 | { | |
860 | volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr; | |
861 | volatile struct rbd_struct *rbd; | |
862 | int i; | |
863 | struct priv *p = (struct priv *) dev->priv; | |
864 | ||
865 | memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs); | |
866 | p->rfd_first = rfd; | |
867 | ||
868 | for (i = 0; i < p->num_recv_buffs; i++) { | |
869 | rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs); | |
870 | } | |
871 | rfd[p->num_recv_buffs - 1].last = RFD_SUSP; /* RU suspend */ | |
872 | ||
873 | ptr = (void *) (rfd + p->num_recv_buffs); | |
874 | ||
875 | rbd = (struct rbd_struct *) ptr; | |
876 | ptr = (void *) (rbd + p->num_recv_buffs); | |
877 | ||
878 | /* clr descriptors */ | |
879 | memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs); | |
880 | ||
881 | for (i = 0; i < p->num_recv_buffs; i++) { | |
882 | rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs)); | |
883 | rbd[i].size = RECV_BUFF_SIZE; | |
884 | rbd[i].buffer = make24(ptr); | |
885 | ptr = (char *) ptr + RECV_BUFF_SIZE; | |
886 | } | |
887 | ||
888 | p->rfd_top = p->rfd_first; | |
889 | p->rfd_last = p->rfd_first + p->num_recv_buffs - 1; | |
890 | ||
891 | p->scb->rfa_offset = make16(p->rfd_first); | |
892 | p->rfd_first->rbd_offset = make16(rbd); | |
893 | ||
894 | return ptr; | |
895 | } | |
896 | ||
897 | ||
898 | /************************************************** | |
899 | * Interrupt Handler ... | |
900 | */ | |
901 | ||
902 | static irqreturn_t | |
903 | elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr) | |
904 | { | |
905 | struct net_device *dev = (struct net_device *) dev_id; | |
906 | unsigned short stat; | |
907 | struct priv *p; | |
908 | ||
909 | if (dev == NULL) { | |
910 | printk(KERN_ERR "elmc-interrupt: irq %d for unknown device.\n", (int) -(((struct pt_regs *) reg_ptr)->orig_eax + 2)); | |
911 | return IRQ_NONE; | |
912 | } else if (!netif_running(dev)) { | |
913 | /* The 3c523 has this habit of generating interrupts during the | |
914 | reset. I'm not sure if the ni52 has this same problem, but it's | |
915 | really annoying if we haven't finished initializing it. I was | |
916 | hoping all the elmc_id_* commands would disable this, but I | |
917 | might have missed a few. */ | |
918 | ||
919 | elmc_id_attn586(); /* ack inter. and disable any more */ | |
920 | return IRQ_HANDLED; | |
921 | } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) { | |
922 | /* wasn't this device */ | |
923 | return IRQ_NONE; | |
924 | } | |
925 | /* reading ELMC_CTRL also clears the INT bit. */ | |
926 | ||
927 | p = (struct priv *) dev->priv; | |
928 | ||
929 | while ((stat = p->scb->status & STAT_MASK)) | |
930 | { | |
931 | p->scb->cmd = stat; | |
932 | elmc_attn586(); /* ack inter. */ | |
933 | ||
934 | if (stat & STAT_CX) { | |
935 | /* command with I-bit set complete */ | |
936 | elmc_xmt_int(dev); | |
937 | } | |
938 | if (stat & STAT_FR) { | |
939 | /* received a frame */ | |
940 | elmc_rcv_int(dev); | |
941 | } | |
942 | #ifndef NO_NOPCOMMANDS | |
943 | if (stat & STAT_CNA) { | |
944 | /* CU went 'not ready' */ | |
945 | if (netif_running(dev)) { | |
946 | printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status); | |
947 | } | |
948 | } | |
949 | #endif | |
950 | ||
951 | if (stat & STAT_RNR) { | |
952 | /* RU went 'not ready' */ | |
953 | ||
954 | if (p->scb->status & RU_SUSPEND) { | |
955 | /* special case: RU_SUSPEND */ | |
956 | ||
957 | WAIT_4_SCB_CMD(); | |
958 | p->scb->cmd = RUC_RESUME; | |
959 | elmc_attn586(); | |
960 | } else { | |
961 | printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status); | |
962 | elmc_rnr_int(dev); | |
963 | } | |
964 | } | |
965 | WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */ | |
966 | if (p->scb->cmd) { /* timed out? */ | |
967 | break; | |
968 | } | |
969 | } | |
970 | return IRQ_HANDLED; | |
971 | } | |
972 | ||
973 | /******************************************************* | |
974 | * receive-interrupt | |
975 | */ | |
976 | ||
977 | static void elmc_rcv_int(struct net_device *dev) | |
978 | { | |
979 | int status; | |
980 | unsigned short totlen; | |
981 | struct sk_buff *skb; | |
982 | struct rbd_struct *rbd; | |
983 | struct priv *p = (struct priv *) dev->priv; | |
984 | ||
985 | for (; (status = p->rfd_top->status) & STAT_COMPL;) { | |
986 | rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset); | |
987 | ||
988 | if (status & STAT_OK) { /* frame received without error? */ | |
989 | if ((totlen = rbd->status) & RBD_LAST) { /* the first and the last buffer? */ | |
990 | totlen &= RBD_MASK; /* length of this frame */ | |
991 | rbd->status = 0; | |
992 | skb = (struct sk_buff *) dev_alloc_skb(totlen + 2); | |
993 | if (skb != NULL) { | |
994 | skb->dev = dev; | |
995 | skb_reserve(skb, 2); /* 16 byte alignment */ | |
996 | skb_put(skb,totlen); | |
997 | eth_copy_and_sum(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen,0); | |
998 | skb->protocol = eth_type_trans(skb, dev); | |
999 | netif_rx(skb); | |
1000 | dev->last_rx = jiffies; | |
1001 | p->stats.rx_packets++; | |
1002 | p->stats.rx_bytes += totlen; | |
1003 | } else { | |
1004 | p->stats.rx_dropped++; | |
1005 | } | |
1006 | } else { | |
1007 | printk(KERN_WARNING "%s: received oversized frame.\n", dev->name); | |
1008 | p->stats.rx_dropped++; | |
1009 | } | |
1010 | } else { /* frame !(ok), only with 'save-bad-frames' */ | |
1011 | printk(KERN_WARNING "%s: oops! rfd-error-status: %04x\n", dev->name, status); | |
1012 | p->stats.rx_errors++; | |
1013 | } | |
1014 | p->rfd_top->status = 0; | |
1015 | p->rfd_top->last = RFD_SUSP; | |
1016 | p->rfd_last->last = 0; /* delete RU_SUSP */ | |
1017 | p->rfd_last = p->rfd_top; | |
1018 | p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */ | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | /********************************************************** | |
1023 | * handle 'Receiver went not ready'. | |
1024 | */ | |
1025 | ||
1026 | static void elmc_rnr_int(struct net_device *dev) | |
1027 | { | |
1028 | struct priv *p = (struct priv *) dev->priv; | |
1029 | ||
1030 | p->stats.rx_errors++; | |
1031 | ||
1032 | WAIT_4_SCB_CMD(); /* wait for the last cmd */ | |
1033 | p->scb->cmd = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */ | |
1034 | elmc_attn586(); | |
1035 | WAIT_4_SCB_CMD(); /* wait for accept cmd. */ | |
1036 | ||
1037 | alloc_rfa(dev, (char *) p->rfd_first); | |
1038 | startrecv586(dev); /* restart RU */ | |
1039 | ||
1040 | printk(KERN_WARNING "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status); | |
1041 | ||
1042 | } | |
1043 | ||
1044 | /********************************************************** | |
1045 | * handle xmit - interrupt | |
1046 | */ | |
1047 | ||
1048 | static void elmc_xmt_int(struct net_device *dev) | |
1049 | { | |
1050 | int status; | |
1051 | struct priv *p = (struct priv *) dev->priv; | |
1052 | ||
1053 | status = p->xmit_cmds[p->xmit_last]->cmd_status; | |
1054 | if (!(status & STAT_COMPL)) { | |
1055 | printk(KERN_WARNING "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name); | |
1056 | } | |
1057 | if (status & STAT_OK) { | |
1058 | p->stats.tx_packets++; | |
1059 | p->stats.collisions += (status & TCMD_MAXCOLLMASK); | |
1060 | } else { | |
1061 | p->stats.tx_errors++; | |
1062 | if (status & TCMD_LATECOLL) { | |
1063 | printk(KERN_WARNING "%s: late collision detected.\n", dev->name); | |
1064 | p->stats.collisions++; | |
1065 | } else if (status & TCMD_NOCARRIER) { | |
1066 | p->stats.tx_carrier_errors++; | |
1067 | printk(KERN_WARNING "%s: no carrier detected.\n", dev->name); | |
1068 | } else if (status & TCMD_LOSTCTS) { | |
1069 | printk(KERN_WARNING "%s: loss of CTS detected.\n", dev->name); | |
1070 | } else if (status & TCMD_UNDERRUN) { | |
1071 | p->stats.tx_fifo_errors++; | |
1072 | printk(KERN_WARNING "%s: DMA underrun detected.\n", dev->name); | |
1073 | } else if (status & TCMD_MAXCOLL) { | |
1074 | printk(KERN_WARNING "%s: Max. collisions exceeded.\n", dev->name); | |
1075 | p->stats.collisions += 16; | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | #if (NUM_XMIT_BUFFS != 1) | |
1080 | if ((++p->xmit_last) == NUM_XMIT_BUFFS) { | |
1081 | p->xmit_last = 0; | |
1082 | } | |
1083 | #endif | |
1084 | ||
1085 | netif_wake_queue(dev); | |
1086 | } | |
1087 | ||
1088 | /*********************************************************** | |
1089 | * (re)start the receiver | |
1090 | */ | |
1091 | ||
1092 | static void startrecv586(struct net_device *dev) | |
1093 | { | |
1094 | struct priv *p = (struct priv *) dev->priv; | |
1095 | ||
1096 | p->scb->rfa_offset = make16(p->rfd_first); | |
1097 | p->scb->cmd = RUC_START; | |
1098 | elmc_attn586(); /* start cmd. */ | |
1099 | WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */ | |
1100 | } | |
1101 | ||
1102 | /****************************************************** | |
1103 | * timeout | |
1104 | */ | |
1105 | ||
1106 | static void elmc_timeout(struct net_device *dev) | |
1107 | { | |
1108 | struct priv *p = (struct priv *) dev->priv; | |
1109 | /* COMMAND-UNIT active? */ | |
1110 | if (p->scb->status & CU_ACTIVE) { | |
1111 | #ifdef DEBUG | |
1112 | printk("%s: strange ... timeout with CU active?!?\n", dev->name); | |
1113 | 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); | |
1114 | #endif | |
1115 | p->scb->cmd = CUC_ABORT; | |
1116 | elmc_attn586(); | |
1117 | WAIT_4_SCB_CMD(); | |
1118 | p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]); | |
1119 | p->scb->cmd = CUC_START; | |
1120 | elmc_attn586(); | |
1121 | WAIT_4_SCB_CMD(); | |
1122 | netif_wake_queue(dev); | |
1123 | } else { | |
1124 | #ifdef DEBUG | |
1125 | printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev->name, p->scb->status); | |
1126 | printk("%s: command-stats: %04x %04x\n", dev->name, p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status); | |
1127 | #endif | |
1128 | elmc_close(dev); | |
1129 | elmc_open(dev); | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | /****************************************************** | |
1134 | * send frame | |
1135 | */ | |
1136 | ||
1137 | static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev) | |
1138 | { | |
1139 | int len; | |
1140 | int i; | |
1141 | #ifndef NO_NOPCOMMANDS | |
1142 | int next_nop; | |
1143 | #endif | |
1144 | struct priv *p = (struct priv *) dev->priv; | |
1145 | ||
1146 | netif_stop_queue(dev); | |
1147 | ||
1148 | len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN; | |
1149 | ||
1150 | if (len != skb->len) | |
1151 | memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN); | |
1152 | memcpy((char *) p->xmit_cbuffs[p->xmit_count], (char *) (skb->data), skb->len); | |
1153 | ||
1154 | #if (NUM_XMIT_BUFFS == 1) | |
1155 | #ifdef NO_NOPCOMMANDS | |
1156 | p->xmit_buffs[0]->size = TBD_LAST | len; | |
1157 | for (i = 0; i < 16; i++) { | |
1158 | p->scb->cbl_offset = make16(p->xmit_cmds[0]); | |
1159 | p->scb->cmd = CUC_START; | |
1160 | p->xmit_cmds[0]->cmd_status = 0; | |
1161 | elmc_attn586(); | |
1162 | dev->trans_start = jiffies; | |
1163 | if (!i) { | |
1164 | dev_kfree_skb(skb); | |
1165 | } | |
1166 | WAIT_4_SCB_CMD(); | |
1167 | if ((p->scb->status & CU_ACTIVE)) { /* test it, because CU sometimes doesn't start immediately */ | |
1168 | break; | |
1169 | } | |
1170 | if (p->xmit_cmds[0]->cmd_status) { | |
1171 | break; | |
1172 | } | |
1173 | if (i == 15) { | |
1174 | printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name); | |
1175 | } | |
1176 | } | |
1177 | #else | |
1178 | next_nop = (p->nop_point + 1) & 0x1; | |
1179 | p->xmit_buffs[0]->size = TBD_LAST | len; | |
1180 | ||
1181 | p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link | |
1182 | = make16((p->nop_cmds[next_nop])); | |
1183 | p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0; | |
1184 | ||
1185 | p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0])); | |
1186 | dev->trans_start = jiffies; | |
1187 | p->nop_point = next_nop; | |
1188 | dev_kfree_skb(skb); | |
1189 | #endif | |
1190 | #else | |
1191 | p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len; | |
1192 | if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) { | |
1193 | next_nop = 0; | |
1194 | } | |
1195 | p->xmit_cmds[p->xmit_count]->cmd_status = 0; | |
1196 | p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link | |
1197 | = make16((p->nop_cmds[next_nop])); | |
1198 | p->nop_cmds[next_nop]->cmd_status = 0; | |
1199 | p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count])); | |
1200 | dev->trans_start = jiffies; | |
1201 | p->xmit_count = next_nop; | |
1202 | if (p->xmit_count != p->xmit_last) | |
1203 | netif_wake_queue(dev); | |
1204 | dev_kfree_skb(skb); | |
1205 | #endif | |
1206 | return 0; | |
1207 | } | |
1208 | ||
1209 | /******************************************* | |
1210 | * Someone wanna have the statistics | |
1211 | */ | |
1212 | ||
1213 | static struct net_device_stats *elmc_get_stats(struct net_device *dev) | |
1214 | { | |
1215 | struct priv *p = (struct priv *) dev->priv; | |
1216 | unsigned short crc, aln, rsc, ovrn; | |
1217 | ||
1218 | crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */ | |
1219 | p->scb->crc_errs -= crc; | |
1220 | aln = p->scb->aln_errs; | |
1221 | p->scb->aln_errs -= aln; | |
1222 | rsc = p->scb->rsc_errs; | |
1223 | p->scb->rsc_errs -= rsc; | |
1224 | ovrn = p->scb->ovrn_errs; | |
1225 | p->scb->ovrn_errs -= ovrn; | |
1226 | ||
1227 | p->stats.rx_crc_errors += crc; | |
1228 | p->stats.rx_fifo_errors += ovrn; | |
1229 | p->stats.rx_frame_errors += aln; | |
1230 | p->stats.rx_dropped += rsc; | |
1231 | ||
1232 | return &p->stats; | |
1233 | } | |
1234 | ||
1235 | /******************************************************** | |
1236 | * Set MC list .. | |
1237 | */ | |
1238 | ||
1239 | #ifdef ELMC_MULTICAST | |
1240 | static void set_multicast_list(struct net_device *dev) | |
1241 | { | |
1242 | if (!dev->start) { | |
1243 | /* without a running interface, promiscuous doesn't work */ | |
1244 | return; | |
1245 | } | |
1246 | dev->start = 0; | |
1247 | alloc586(dev); | |
1248 | init586(dev); | |
1249 | startrecv586(dev); | |
1250 | dev->start = 1; | |
1251 | } | |
1252 | #endif | |
1253 | ||
1254 | static void netdev_get_drvinfo(struct net_device *dev, | |
1255 | struct ethtool_drvinfo *info) | |
1256 | { | |
1257 | strcpy(info->driver, DRV_NAME); | |
1258 | strcpy(info->version, DRV_VERSION); | |
1259 | sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr); | |
1260 | } | |
1261 | ||
1262 | static struct ethtool_ops netdev_ethtool_ops = { | |
1263 | .get_drvinfo = netdev_get_drvinfo, | |
1264 | }; | |
1265 | ||
1266 | #ifdef MODULE | |
1267 | ||
1268 | /* Increase if needed ;) */ | |
1269 | #define MAX_3C523_CARDS 4 | |
1270 | ||
1271 | static struct net_device *dev_elmc[MAX_3C523_CARDS]; | |
1272 | static int irq[MAX_3C523_CARDS]; | |
1273 | static int io[MAX_3C523_CARDS]; | |
1274 | module_param_array(irq, int, NULL, 0); | |
1275 | module_param_array(io, int, NULL, 0); | |
1276 | MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)"); | |
1277 | MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)"); | |
7b24017e | 1278 | MODULE_LICENSE("GPL"); |
1da177e4 | 1279 | |
96e672c7 | 1280 | int __init init_module(void) |
1da177e4 LT |
1281 | { |
1282 | int this_dev,found = 0; | |
1283 | ||
1284 | /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */ | |
1285 | for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) { | |
1286 | struct net_device *dev = alloc_etherdev(sizeof(struct priv)); | |
1287 | if (!dev) | |
1288 | break; | |
1289 | dev->irq=irq[this_dev]; | |
1290 | dev->base_addr=io[this_dev]; | |
1291 | if (do_elmc_probe(dev) == 0) { | |
b1fc5505 HX |
1292 | dev_elmc[this_dev] = dev; |
1293 | found++; | |
1294 | continue; | |
1da177e4 LT |
1295 | } |
1296 | free_netdev(dev); | |
1297 | if (io[this_dev]==0) | |
1298 | break; | |
1299 | printk(KERN_WARNING "3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]); | |
1300 | } | |
1301 | ||
1302 | if(found==0) { | |
1303 | if(io[0]==0) printk(KERN_NOTICE "3c523.c: No 3c523 cards found\n"); | |
1304 | return -ENXIO; | |
1305 | } else return 0; | |
1306 | } | |
1307 | ||
1308 | void cleanup_module(void) | |
1309 | { | |
1310 | int this_dev; | |
1311 | for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) { | |
1312 | struct net_device *dev = dev_elmc[this_dev]; | |
1313 | if (dev) { | |
1314 | unregister_netdev(dev); | |
1315 | cleanup_card(dev); | |
1316 | free_netdev(dev); | |
1317 | } | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | #endif /* MODULE */ |