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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / net / tokenring / ibmtr.c
blob36cb2423bcf12d2690aab67ca2921b01edfb4fa1
1 /* ibmtr.c: A shared-memory IBM Token Ring 16/4 driver for linux
2 *
3 * Written 1993 by Mark Swanson and Peter De Schrijver.
4 * This software may be used and distributed according to the terms
5 * of the GNU General Public License, incorporated herein by reference.
6 *
7 * This device driver should work with Any IBM Token Ring Card that does
8 * not use DMA.
9 *
10 * I used Donald Becker's (becker@scyld.com) device driver work
11 * as a base for most of my initial work.
12 *
13 * Changes by Peter De Schrijver
14 * (Peter.Deschrijver@linux.cc.kuleuven.ac.be) :
15 *
16 * + changed name to ibmtr.c in anticipation of other tr boards.
17 * + changed reset code and adapter open code.
18 * + added SAP open code.
19 * + a first attempt to write interrupt, transmit and receive routines.
20 *
21 * Changes by David W. Morris (dwm@shell.portal.com) :
22 * 941003 dwm: - Restructure tok_probe for multiple adapters, devices.
23 * + Add comments, misc reorg for clarity.
24 * + Flatten interrupt handler levels.
25 *
26 * Changes by Farzad Farid (farzy@zen.via.ecp.fr)
27 * and Pascal Andre (andre@chimay.via.ecp.fr) (March 9 1995) :
28 * + multi ring support clean up.
29 * + RFC1042 compliance enhanced.
30 *
31 * Changes by Pascal Andre (andre@chimay.via.ecp.fr) (September 7 1995) :
32 * + bug correction in tr_tx
33 * + removed redundant information display
34 * + some code reworking
35 *
36 * Changes by Michel Lespinasse (walken@via.ecp.fr),
37 * Yann Doussot (doussot@via.ecp.fr) and Pascal Andre (andre@via.ecp.fr)
38 * (February 18, 1996) :
39 * + modified shared memory and mmio access port the driver to
40 * alpha platform (structure access -> readb/writeb)
41 *
42 * Changes by Steve Kipisz (bungy@ibm.net or kipisz@vnet.ibm.com)
43 * (January 18 1996):
44 * + swapped WWOR and WWCR in ibmtr.h
45 * + moved some init code from tok_probe into trdev_init. The
46 * PCMCIA code can call trdev_init to complete initializing
47 * the driver.
48 * + added -DPCMCIA to support PCMCIA
49 * + detecting PCMCIA Card Removal in interrupt handler. If
50 * ISRP is FF, then a PCMCIA card has been removed
51 * 10/2000 Burt needed a new method to avoid crashing the OS
52 *
53 * Changes by Paul Norton (pnorton@cts.com) :
54 * + restructured the READ.LOG logic to prevent the transmit SRB
55 * from being rudely overwritten before the transmit cycle is
56 * complete. (August 15 1996)
57 * + completed multiple adapter support. (November 20 1996)
58 * + implemented csum_partial_copy in tr_rx and increased receive
59 * buffer size and count. Minor fixes. (March 15, 1997)
60 *
61 * Changes by Christopher Turcksin <wabbit@rtfc.demon.co.uk>
62 * + Now compiles ok as a module again.
63 *
64 * Changes by Paul Norton (pnorton@ieee.org) :
65 * + moved the header manipulation code in tr_tx and tr_rx to
66 * net/802/tr.c. (July 12 1997)
67 * + add retry and timeout on open if cable disconnected. (May 5 1998)
68 * + lifted 2000 byte mtu limit. now depends on shared-RAM size.
69 * May 25 1998)
70 * + can't allocate 2k recv buff at 8k shared-RAM. (20 October 1998)
71 *
72 * Changes by Joel Sloan (jjs@c-me.com) :
73 * + disable verbose debug messages by default - to enable verbose
74 * debugging, edit the IBMTR_DEBUG_MESSAGES define below
75 *
76 * Changes by Mike Phillips <phillim@amtrak.com> :
77 * + Added extra #ifdef's to work with new PCMCIA Token Ring Code.
78 * The PCMCIA code now just sets up the card so it can be recognized
79 * by ibmtr_probe. Also checks allocated memory vs. on-board memory
80 * for correct figure to use.
81 *
82 * Changes by Tim Hockin (thockin@isunix.it.ilstu.edu) :
83 * + added spinlocks for SMP sanity (10 March 1999)
84 *
85 * Changes by Jochen Friedrich to enable RFC1469 Option 2 multicasting
86 * i.e. using functional address C0 00 00 04 00 00 to transmit and
87 * receive multicast packets.
88 *
89 * Changes by Mike Sullivan (based on original sram patch by Dave Grothe
90 * to support windowing into on adapter shared ram.
91 * i.e. Use LANAID to setup a PnP configuration with 16K RAM. Paging
92 * will shift this 16K window over the entire available shared RAM.
93 *
94 * Changes by Peter De Schrijver (p2@mind.be) :
95 * + fixed a problem with PCMCIA card removal
96 *
97 * Change by Mike Sullivan et al.:
98 * + added turbo card support. No need to use lanaid to configure
99 * the adapter into isa compatiblity mode.
100 *
101 * Changes by Burt Silverman to allow the computer to behave nicely when
102 * a cable is pulled or not in place, or a PCMCIA card is removed hot.
103 */
104
105 /* change the define of IBMTR_DEBUG_MESSAGES to a nonzero value
106 in the event that chatty debug messages are desired - jjs 12/30/98 */
107
108 #define IBMTR_DEBUG_MESSAGES 0
109
110 #include <linux/module.h>
111 #include <linux/sched.h>
112
113 #ifdef PCMCIA /* required for ibmtr_cs.c to build */
114 #undef MODULE /* yes, really */
115 #undef ENABLE_PAGING
116 #else
117 #define ENABLE_PAGING 1
118 #endif
119
120 /* changes the output format of driver initialization */
121 #define TR_VERBOSE 0
122
123 /* some 95 OS send many non UI frame; this allow removing the warning */
124 #define TR_FILTERNONUI 1
125
126 #include <linux/ioport.h>
127 #include <linux/netdevice.h>
128 #include <linux/ip.h>
129 #include <linux/trdevice.h>
130 #include <linux/ibmtr.h>
131
132 #include <net/checksum.h>
133
134 #include <asm/io.h>
135
136 #define DPRINTK(format, args...) printk("%s: " format, dev->name , ## args)
137 #define DPRINTD(format, args...) DummyCall("%s: " format, dev->name , ## args)
138
139 /* version and credits */
140 #ifndef PCMCIA
141 static char version[] __devinitdata =
142 "\nibmtr.c: v1.3.57 8/ 7/94 Peter De Schrijver and Mark Swanson\n"
143 " v2.1.125 10/20/98 Paul Norton <pnorton@ieee.org>\n"
144 " v2.2.0 12/30/98 Joel Sloan <jjs@c-me.com>\n"
145 " v2.2.1 02/08/00 Mike Sullivan <sullivam@us.ibm.com>\n"
146 " v2.2.2 07/27/00 Burt Silverman <burts@us.ibm.com>\n"
147 " v2.4.0 03/01/01 Mike Sullivan <sullivan@us.ibm.com>\n";
148 #endif
149
150 /* this allows displaying full adapter information */
151
152 static char *channel_def[] __devinitdata = { "ISA", "MCA", "ISA P&P" };
153
154 static char pcchannelid[] __devinitdata = {
155 0x05, 0x00, 0x04, 0x09,
156 0x04, 0x03, 0x04, 0x0f,
157 0x03, 0x06, 0x03, 0x01,
158 0x03, 0x01, 0x03, 0x00,
159 0x03, 0x09, 0x03, 0x09,
160 0x03, 0x00, 0x02, 0x00
161 };
162
163 static char mcchannelid[] __devinitdata = {
164 0x04, 0x0d, 0x04, 0x01,
165 0x05, 0x02, 0x05, 0x03,
166 0x03, 0x06, 0x03, 0x03,
167 0x05, 0x08, 0x03, 0x04,
168 0x03, 0x05, 0x03, 0x01,
169 0x03, 0x08, 0x02, 0x00
170 };
171
172 static char __devinit *adapter_def(char type)
173 {
174 switch (type) {
175 case 0xF: return "PC Adapter | PC Adapter II | Adapter/A";
176 case 0xE: return "16/4 Adapter | 16/4 Adapter/A (long)";
177 case 0xD: return "16/4 Adapter/A (short) | 16/4 ISA-16 Adapter";
178 case 0xC: return "Auto 16/4 Adapter";
179 default: return "adapter (unknown type)";
180 };
181 };
182
183 #define TRC_INIT 0x01 /* Trace initialization & PROBEs */
184 #define TRC_INITV 0x02 /* verbose init trace points */
185 static unsigned char ibmtr_debug_trace = 0;
186
187 static int ibmtr_probe1(struct net_device *dev, int ioaddr);
188 static unsigned char get_sram_size(struct tok_info *adapt_info);
189 static int trdev_init(struct net_device *dev);
190 static int tok_open(struct net_device *dev);
191 static int tok_init_card(struct net_device *dev);
192 static void tok_open_adapter(unsigned long dev_addr);
193 static void open_sap(unsigned char type, struct net_device *dev);
194 static void tok_set_multicast_list(struct net_device *dev);
195 static netdev_tx_t tok_send_packet(struct sk_buff *skb,
196 struct net_device *dev);
197 static int tok_close(struct net_device *dev);
198 static irqreturn_t tok_interrupt(int irq, void *dev_id);
199 static void initial_tok_int(struct net_device *dev);
200 static void tr_tx(struct net_device *dev);
201 static void tr_rx(struct net_device *dev);
202 static void ibmtr_reset_timer(struct timer_list*tmr,struct net_device *dev);
203 static void tok_rerun(unsigned long dev_addr);
204 static void ibmtr_readlog(struct net_device *dev);
205 static int ibmtr_change_mtu(struct net_device *dev, int mtu);
206 static void find_turbo_adapters(int *iolist);
207
208 static int ibmtr_portlist[IBMTR_MAX_ADAPTERS+1] __devinitdata = {
209 0xa20, 0xa24, 0, 0, 0
210 };
211 static int __devinitdata turbo_io[IBMTR_MAX_ADAPTERS] = {0};
212 static int __devinitdata turbo_irq[IBMTR_MAX_ADAPTERS] = {0};
213 static int __devinitdata turbo_searched = 0;
214
215 #ifndef PCMCIA
216 static __u32 ibmtr_mem_base __devinitdata = 0xd0000;
217 #endif
218
219 static void __devinit PrtChanID(char *pcid, short stride)
220 {
221 short i, j;
222 for (i = 0, j = 0; i < 24; i++, j += stride)
223 printk("%1x", ((int) pcid[j]) & 0x0f);
224 printk("\n");
225 }
226
227 static void __devinit HWPrtChanID(void __iomem *pcid, short stride)
228 {
229 short i, j;
230 for (i = 0, j = 0; i < 24; i++, j += stride)
231 printk("%1x", ((int) readb(pcid + j)) & 0x0f);
232 printk("\n");
233 }
234
235 /* We have to ioremap every checked address, because isa_readb is
236 * going away.
237 */
238
239 static void __devinit find_turbo_adapters(int *iolist)
240 {
241 int ram_addr;
242 int index=0;
243 void __iomem *chanid;
244 int found_turbo=0;
245 unsigned char *tchanid, ctemp;
246 int i, j;
247 unsigned long jif;
248 void __iomem *ram_mapped ;
249
250 if (turbo_searched == 1) return;
251 turbo_searched=1;
252 for (ram_addr=0xC0000; ram_addr < 0xE0000; ram_addr+=0x2000) {
253
254 __u32 intf_tbl=0;
255
256 found_turbo=1;
257 ram_mapped = ioremap((u32)ram_addr,0x1fff) ;
258 if (ram_mapped==NULL)
259 continue ;
260 chanid=(CHANNEL_ID + ram_mapped);
261 tchanid=pcchannelid;
262 ctemp=readb(chanid) & 0x0f;
263 if (ctemp != *tchanid) continue;
264 for (i=2,j=1; i<=46; i=i+2,j++) {
265 if ((readb(chanid+i) & 0x0f) != tchanid[j]){
266 found_turbo=0;
267 break;
268 }
269 }
270 if (!found_turbo) continue;
271
272 writeb(0x90, ram_mapped+0x1E01);
273 for(i=2; i<0x0f; i++) {
274 writeb(0x00, ram_mapped+0x1E01+i);
275 }
276 writeb(0x00, ram_mapped+0x1E01);
277 for(jif=jiffies+TR_BUSY_INTERVAL; time_before_eq(jiffies,jif););
278 intf_tbl=ntohs(readw(ram_mapped+ACA_OFFSET+ACA_RW+WRBR_EVEN));
279 if (intf_tbl) {
280 #if IBMTR_DEBUG_MESSAGES
281 printk("ibmtr::find_turbo_adapters, Turbo found at "
282 "ram_addr %x\n",ram_addr);
283 printk("ibmtr::find_turbo_adapters, interface_table ");
284 for(i=0; i<6; i++) {
285 printk("%x:",readb(ram_addr+intf_tbl+i));
286 }
287 printk("\n");
288 #endif
289 turbo_io[index]=ntohs(readw(ram_mapped+intf_tbl+4));
290 turbo_irq[index]=readb(ram_mapped+intf_tbl+3);
291 outb(0, turbo_io[index] + ADAPTRESET);
292 for(jif=jiffies+TR_RST_TIME;time_before_eq(jiffies,jif););
293 outb(0, turbo_io[index] + ADAPTRESETREL);
294 index++;
295 continue;
296 }
297 #if IBMTR_DEBUG_MESSAGES
298 printk("ibmtr::find_turbo_adapters, ibmtr card found at"
299 " %x but not a Turbo model\n",ram_addr);
300 #endif
301 iounmap(ram_mapped) ;
302 } /* for */
303 for(i=0; i<IBMTR_MAX_ADAPTERS; i++) {
304 if(!turbo_io[i]) break;
305 for (j=0; j<IBMTR_MAX_ADAPTERS; j++) {
306 if ( iolist[j] && iolist[j] != turbo_io[i]) continue;
307 iolist[j]=turbo_io[i];
308 break;
309 }
310 }
311 }
312
313 static void ibmtr_cleanup_card(struct net_device *dev)
314 {
315 if (dev->base_addr) {
316 outb(0,dev->base_addr+ADAPTRESET);
317
318 schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
319
320 outb(0,dev->base_addr+ADAPTRESETREL);
321 }
322
323 #ifndef PCMCIA
324 free_irq(dev->irq, dev);
325 release_region(dev->base_addr, IBMTR_IO_EXTENT);
326
327 {
328 struct tok_info *ti = netdev_priv(dev);
329 iounmap(ti->mmio);
330 iounmap(ti->sram_virt);
331 }
332 #endif
333 }
334
335 /****************************************************************************
336 * ibmtr_probe(): Routine specified in the network device structure
337 * to probe for an IBM Token Ring Adapter. Routine outline:
338 * I. Interrogate hardware to determine if an adapter exists
339 * and what the speeds and feeds are
340 * II. Setup data structures to control execution based upon
341 * adapter characteristics.
342 *
343 * We expect ibmtr_probe to be called once for each device entry
344 * which references it.
345 ****************************************************************************/
346
347 static int __devinit ibmtr_probe(struct net_device *dev)
348 {
349 int i;
350 int base_addr = dev->base_addr;
351
352 if (base_addr && base_addr <= 0x1ff) /* Don't probe at all. */
353 return -ENXIO;
354 if (base_addr > 0x1ff) { /* Check a single specified location. */
355 if (!ibmtr_probe1(dev, base_addr)) return 0;
356 return -ENODEV;
357 }
358 find_turbo_adapters(ibmtr_portlist);
359 for (i = 0; ibmtr_portlist[i]; i++) {
360 int ioaddr = ibmtr_portlist[i];
361
362 if (!ibmtr_probe1(dev, ioaddr)) return 0;
363 }
364 return -ENODEV;
365 }
366
367 int __devinit ibmtr_probe_card(struct net_device *dev)
368 {
369 int err = ibmtr_probe(dev);
370 if (!err) {
371 err = register_netdev(dev);
372 if (err)
373 ibmtr_cleanup_card(dev);
374 }
375 return err;
376 }
377
378 /*****************************************************************************/
379
380 static int __devinit ibmtr_probe1(struct net_device *dev, int PIOaddr)
381 {
382
383 unsigned char segment, intr=0, irq=0, i, j, cardpresent=NOTOK, temp=0;
384 void __iomem * t_mmio = NULL;
385 struct tok_info *ti = netdev_priv(dev);
386 void __iomem *cd_chanid;
387 unsigned char *tchanid, ctemp;
388 #ifndef PCMCIA
389 unsigned char t_irq=0;
390 unsigned long timeout;
391 static int version_printed;
392 #endif
393
394 /* Query the adapter PIO base port which will return
395 * indication of where MMIO was placed. We also have a
396 * coded interrupt number.
397 */
398 segment = inb(PIOaddr);
399 if (segment < 0x40 || segment > 0xe0) {
400 /* Out of range values so we'll assume non-existent IO device
401 * but this is not necessarily a problem, esp if a turbo
402 * adapter is being used. */
403 #if IBMTR_DEBUG_MESSAGES
404 DPRINTK("ibmtr_probe1(): unhappy that inb(0x%X) == 0x%X, "
405 "Hardware Problem?\n",PIOaddr,segment);
406 #endif
407 return -ENODEV;
408 }
409 /*
410 * Compute the linear base address of the MMIO area
411 * as LINUX doesn't care about segments
412 */
413 t_mmio = ioremap(((__u32) (segment & 0xfc) << 11) + 0x80000,2048);
414 if (!t_mmio) {
415 DPRINTK("Cannot remap mmiobase memory area") ;
416 return -ENODEV ;
417 }
418 intr = segment & 0x03; /* low bits is coded interrupt # */
419 if (ibmtr_debug_trace & TRC_INIT)
420 DPRINTK("PIOaddr: %4hx seg/intr: %2x mmio base: %p intr: %d\n"
421 , PIOaddr, (int) segment, t_mmio, (int) intr);
422
423 /*
424 * Now we will compare expected 'channelid' strings with
425 * what we is there to learn of ISA/MCA or not TR card
426 */
427 #ifdef PCMCIA
428 iounmap(t_mmio);
429 t_mmio = ti->mmio; /*BMS to get virtual address */
430 irq = ti->irq; /*BMS to display the irq! */
431 #endif
432 cd_chanid = (CHANNEL_ID + t_mmio); /* for efficiency */
433 tchanid = pcchannelid;
434 cardpresent = TR_ISA; /* try ISA */
435
436 /* Suboptimize knowing first byte different */
437 ctemp = readb(cd_chanid) & 0x0f;
438 if (ctemp != *tchanid) { /* NOT ISA card, try MCA */
439 tchanid = mcchannelid;
440 cardpresent = TR_MCA;
441 if (ctemp != *tchanid) /* Neither ISA nor MCA */
442 cardpresent = NOTOK;
443 }
444 if (cardpresent != NOTOK) {
445 /* Know presumed type, try rest of ID */
446 for (i = 2, j = 1; i <= 46; i = i + 2, j++) {
447 if( (readb(cd_chanid+i)&0x0f) == tchanid[j]) continue;
448 /* match failed, not TR card */
449 cardpresent = NOTOK;
450 break;
451 }
452 }
453 /*
454 * If we have an ISA board check for the ISA P&P version,
455 * as it has different IRQ settings
456 */
457 if (cardpresent == TR_ISA && (readb(AIPFID + t_mmio) == 0x0e))
458 cardpresent = TR_ISAPNP;
459 if (cardpresent == NOTOK) { /* "channel_id" did not match, report */
460 if (!(ibmtr_debug_trace & TRC_INIT)) {
461 #ifndef PCMCIA
462 iounmap(t_mmio);
463 #endif
464 return -ENODEV;
465 }
466 DPRINTK( "Channel ID string not found for PIOaddr: %4hx\n",
467 PIOaddr);
468 DPRINTK("Expected for ISA: ");
469 PrtChanID(pcchannelid, 1);
470 DPRINTK(" found: ");
471 /* BMS Note that this can be misleading, when hardware is flaky, because you
472 are reading it a second time here. So with my flaky hardware, I'll see my-
473 self in this block, with the HW ID matching the ISA ID exactly! */
474 HWPrtChanID(cd_chanid, 2);
475 DPRINTK("Expected for MCA: ");
476 PrtChanID(mcchannelid, 1);
477 }
478 /* Now, setup some of the pl0 buffers for this driver.. */
479 /* If called from PCMCIA, it is already set up, so no need to
480 waste the memory, just use the existing structure */
481 #ifndef PCMCIA
482 ti->mmio = t_mmio;
483 for (i = 0; i < IBMTR_MAX_ADAPTERS; i++) {
484 if (turbo_io[i] != PIOaddr)
485 continue;
486 #if IBMTR_DEBUG_MESSAGES
487 printk("ibmtr::tr_probe1, setting PIOaddr %x to Turbo\n",
488 PIOaddr);
489 #endif
490 ti->turbo = 1;
491 t_irq = turbo_irq[i];
492 }
493 #endif /* !PCMCIA */
494 ti->readlog_pending = 0;
495 init_waitqueue_head(&ti->wait_for_reset);
496
497 /* if PCMCIA, the card can be recognized as either TR_ISA or TR_ISAPNP
498 * depending which card is inserted. */
499
500 #ifndef PCMCIA
501 switch (cardpresent) {
502 case TR_ISA:
503 if (intr == 0) irq = 9; /* irq2 really is irq9 */
504 if (intr == 1) irq = 3;
505 if (intr == 2) irq = 6;
506 if (intr == 3) irq = 7;
507 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
508 break;
509 case TR_MCA:
510 if (intr == 0) irq = 9;
511 if (intr == 1) irq = 3;
512 if (intr == 2) irq = 10;
513 if (intr == 3) irq = 11;
514 ti->global_int_enable = 0;
515 ti->adapter_int_enable = 0;
516 ti->sram_phys=(__u32)(inb(PIOaddr+ADAPTRESETREL) & 0xfe) << 12;
517 break;
518 case TR_ISAPNP:
519 if (!t_irq) {
520 if (intr == 0) irq = 9;
521 if (intr == 1) irq = 3;
522 if (intr == 2) irq = 10;
523 if (intr == 3) irq = 11;
524 } else
525 irq=t_irq;
526 timeout = jiffies + TR_SPIN_INTERVAL;
527 while (!readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)){
528 if (!time_after(jiffies, timeout)) continue;
529 DPRINTK( "Hardware timeout during initialization.\n");
530 iounmap(t_mmio);
531 return -ENODEV;
532 }
533 ti->sram_phys =
534 ((__u32)readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_EVEN)<<12);
535 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
536 break;
537 } /*end switch (cardpresent) */
538 #endif /*not PCMCIA */
539
540 if (ibmtr_debug_trace & TRC_INIT) { /* just report int */
541 DPRINTK("irq=%d", irq);
542 printk(", sram_phys=0x%x", ti->sram_phys);
543 if(ibmtr_debug_trace&TRC_INITV){ /* full chat in verbose only */
544 DPRINTK(", ti->mmio=%p", ti->mmio);
545 printk(", segment=%02X", segment);
546 }
547 printk(".\n");
548 }
549
550 /* Get hw address of token ring card */
551 j = 0;
552 for (i = 0; i < 0x18; i = i + 2) {
553 /* technical reference states to do this */
554 temp = readb(ti->mmio + AIP + i) & 0x0f;
555 ti->hw_address[j] = temp;
556 if (j & 1)
557 dev->dev_addr[(j / 2)] =
558 ti->hw_address[j]+ (ti->hw_address[j - 1] << 4);
559 ++j;
560 }
561 /* get Adapter type: 'F' = Adapter/A, 'E' = 16/4 Adapter II,... */
562 ti->adapter_type = readb(ti->mmio + AIPADAPTYPE);
563
564 /* get Data Rate: F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */
565 ti->data_rate = readb(ti->mmio + AIPDATARATE);
566
567 /* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */
568 ti->token_release = readb(ti->mmio + AIPEARLYTOKEN);
569
570 /* How much shared RAM is on adapter ? */
571 if (ti->turbo) {
572 ti->avail_shared_ram=127;
573 } else {
574 ti->avail_shared_ram = get_sram_size(ti);/*in 512 byte units */
575 }
576 /* We need to set or do a bunch of work here based on previous results*/
577 /* Support paging? What sizes?: F=no, E=16k, D=32k, C=16 & 32k */
578 ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE);
579
580 /* Available DHB 4Mb size: F=2048, E=4096, D=4464 */
581 switch (readb(ti->mmio + AIP4MBDHB)) {
582 case 0xe: ti->dhb_size4mb = 4096; break;
583 case 0xd: ti->dhb_size4mb = 4464; break;
584 default: ti->dhb_size4mb = 2048; break;
585 }
586
587 /* Available DHB 16Mb size: F=2048, E=4096, D=8192, C=16384, B=17960 */
588 switch (readb(ti->mmio + AIP16MBDHB)) {
589 case 0xe: ti->dhb_size16mb = 4096; break;
590 case 0xd: ti->dhb_size16mb = 8192; break;
591 case 0xc: ti->dhb_size16mb = 16384; break;
592 case 0xb: ti->dhb_size16mb = 17960; break;
593 default: ti->dhb_size16mb = 2048; break;
594 }
595
596 /* We must figure out how much shared memory space this adapter
597 * will occupy so that if there are two adapters we can fit both
598 * in. Given a choice, we will limit this adapter to 32K. The
599 * maximum space will will use for two adapters is 64K so if the
600 * adapter we are working on demands 64K (it also doesn't support
601 * paging), then only one adapter can be supported.
602 */
603
604 /*
605 * determine how much of total RAM is mapped into PC space
606 */
607 ti->mapped_ram_size= /*sixteen to onehundredtwentyeight 512byte blocks*/
608 1<< ((readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03) + 4);
609 ti->page_mask = 0;
610 if (ti->turbo) ti->page_mask=0xf0;
611 else if (ti->shared_ram_paging == 0xf); /* No paging in adapter */
612 else {
613 #ifdef ENABLE_PAGING
614 unsigned char pg_size = 0;
615 /* BMS: page size: PCMCIA, use configuration register;
616 ISAPNP, use LANAIDC config tool from www.ibm.com */
617 switch (ti->shared_ram_paging) {
618 case 0xf:
619 break;
620 case 0xe:
621 ti->page_mask = (ti->mapped_ram_size == 32) ? 0xc0 : 0;
622 pg_size = 32; /* 16KB page size */
623 break;
624 case 0xd:
625 ti->page_mask = (ti->mapped_ram_size == 64) ? 0x80 : 0;
626 pg_size = 64; /* 32KB page size */
627 break;
628 case 0xc:
629 switch (ti->mapped_ram_size) {
630 case 32:
631 ti->page_mask = 0xc0;
632 pg_size = 32;
633 break;
634 case 64:
635 ti->page_mask = 0x80;
636 pg_size = 64;
637 break;
638 }
639 break;
640 default:
641 DPRINTK("Unknown shared ram paging info %01X\n",
642 ti->shared_ram_paging);
643 iounmap(t_mmio);
644 return -ENODEV;
645 break;
646 } /*end switch shared_ram_paging */
647
648 if (ibmtr_debug_trace & TRC_INIT)
649 DPRINTK("Shared RAM paging code: %02X, "
650 "mapped RAM size: %dK, shared RAM size: %dK, "
651 "page mask: %02X\n:",
652 ti->shared_ram_paging, ti->mapped_ram_size / 2,
653 ti->avail_shared_ram / 2, ti->page_mask);
654 #endif /*ENABLE_PAGING */
655 }
656
657 #ifndef PCMCIA
658 /* finish figuring the shared RAM address */
659 if (cardpresent == TR_ISA) {
660 static __u32 ram_bndry_mask[] =
661 { 0xffffe000, 0xffffc000, 0xffff8000, 0xffff0000 };
662 __u32 new_base, rrr_32, chk_base, rbm;
663
664 rrr_32=readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03;
665 rbm = ram_bndry_mask[rrr_32];
666 new_base = (ibmtr_mem_base + (~rbm)) & rbm;/* up to boundary */
667 chk_base = new_base + (ti->mapped_ram_size << 9);
668 if (chk_base > (ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE)) {
669 DPRINTK("Shared RAM for this adapter (%05x) exceeds "
670 "driver limit (%05x), adapter not started.\n",
671 chk_base, ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE);
672 iounmap(t_mmio);
673 return -ENODEV;
674 } else { /* seems cool, record what we have figured out */
675 ti->sram_base = new_base >> 12;
676 ibmtr_mem_base = chk_base;
677 }
678 }
679 else ti->sram_base = ti->sram_phys >> 12;
680
681 /* The PCMCIA has already got the interrupt line and the io port,
682 so no chance of anybody else getting it - MLP */
683 if (request_irq(dev->irq = irq, &tok_interrupt, 0, "ibmtr", dev) != 0) {
684 DPRINTK("Could not grab irq %d. Halting Token Ring driver.\n",
685 irq);
686 iounmap(t_mmio);
687 return -ENODEV;
688 }
689 /*?? Now, allocate some of the PIO PORTs for this driver.. */
690 /* record PIOaddr range as busy */
691 if (!request_region(PIOaddr, IBMTR_IO_EXTENT, "ibmtr")) {
692 DPRINTK("Could not grab PIO range. Halting driver.\n");
693 free_irq(dev->irq, dev);
694 iounmap(t_mmio);
695 return -EBUSY;
696 }
697
698 if (!version_printed++) {
699 printk(version);
700 }
701 #endif /* !PCMCIA */
702 DPRINTK("%s %s found\n",
703 channel_def[cardpresent - 1], adapter_def(ti->adapter_type));
704 DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n",
705 irq, PIOaddr, ti->mapped_ram_size / 2);
706 DPRINTK("Hardware address : %pM\n", dev->dev_addr);
707 if (ti->page_mask)
708 DPRINTK("Shared RAM paging enabled. "
709 "Page size: %uK Shared Ram size %dK\n",
710 ((ti->page_mask^0xff)+1) >>2, ti->avail_shared_ram / 2);
711 else
712 DPRINTK("Shared RAM paging disabled. ti->page_mask %x\n",
713 ti->page_mask);
714
715 /* Calculate the maximum DHB we can use */
716 /* two cases where avail_shared_ram doesn't equal mapped_ram_size:
717 1. avail_shared_ram is 127 but mapped_ram_size is 128 (typical)
718 2. user has configured adapter for less than avail_shared_ram
719 but is not using paging (she should use paging, I believe)
720 */
721 if (!ti->page_mask) {
722 ti->avail_shared_ram=
723 min(ti->mapped_ram_size,ti->avail_shared_ram);
724 }
725
726 switch (ti->avail_shared_ram) {
727 case 16: /* 8KB shared RAM */
728 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)2048);
729 ti->rbuf_len4 = 1032;
730 ti->rbuf_cnt4=2;
731 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)2048);
732 ti->rbuf_len16 = 1032;
733 ti->rbuf_cnt16=2;
734 break;
735 case 32: /* 16KB shared RAM */
736 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
737 ti->rbuf_len4 = 1032;
738 ti->rbuf_cnt4=4;
739 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)4096);
740 ti->rbuf_len16 = 1032; /*1024 usable */
741 ti->rbuf_cnt16=4;
742 break;
743 case 64: /* 32KB shared RAM */
744 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
745 ti->rbuf_len4 = 1032;
746 ti->rbuf_cnt4=6;
747 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)10240);
748 ti->rbuf_len16 = 1032;
749 ti->rbuf_cnt16=6;
750 break;
751 case 127: /* 63.5KB shared RAM */
752 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
753 ti->rbuf_len4 = 1032;
754 ti->rbuf_cnt4=6;
755 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)16384);
756 ti->rbuf_len16 = 1032;
757 ti->rbuf_cnt16=16;
758 break;
759 case 128: /* 64KB shared RAM */
760 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
761 ti->rbuf_len4 = 1032;
762 ti->rbuf_cnt4=6;
763 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)17960);
764 ti->rbuf_len16 = 1032;
765 ti->rbuf_cnt16=16;
766 break;
767 default:
768 ti->dhb_size4mb = 2048;
769 ti->rbuf_len4 = 1032;
770 ti->rbuf_cnt4=2;
771 ti->dhb_size16mb = 2048;
772 ti->rbuf_len16 = 1032;
773 ti->rbuf_cnt16=2;
774 break;
775 }
776 /* this formula is not smart enough for the paging case
777 ti->rbuf_cnt<x> = (ti->avail_shared_ram * BLOCKSZ - ADAPT_PRIVATE -
778 ARBLENGTH - SSBLENGTH - DLC_MAX_SAP * SAPLENGTH -
779 DLC_MAX_STA * STALENGTH - ti->dhb_size<x>mb * NUM_DHB -
780 SRBLENGTH - ASBLENGTH) / ti->rbuf_len<x>;
781 */
782 ti->maxmtu16 = (ti->rbuf_len16 - 8) * ti->rbuf_cnt16 - TR_HLEN;
783 ti->maxmtu4 = (ti->rbuf_len4 - 8) * ti->rbuf_cnt4 - TR_HLEN;
784 /*BMS assuming 18 bytes of Routing Information (usually works) */
785 DPRINTK("Maximum Receive Internet Protocol MTU 16Mbps: %d, 4Mbps: %d\n",
786 ti->maxmtu16, ti->maxmtu4);
787
788 dev->base_addr = PIOaddr; /* set the value for device */
789 dev->mem_start = ti->sram_base << 12;
790 dev->mem_end = dev->mem_start + (ti->mapped_ram_size << 9) - 1;
791 trdev_init(dev);
792 return 0; /* Return 0 to indicate we have found a Token Ring card. */
793 } /*ibmtr_probe1() */
794
795 /*****************************************************************************/
796
797 /* query the adapter for the size of shared RAM */
798 /* the function returns the RAM size in units of 512 bytes */
799
800 static unsigned char __devinit get_sram_size(struct tok_info *adapt_info)
801 {
802 unsigned char avail_sram_code;
803 static unsigned char size_code[] = { 0, 16, 32, 64, 127, 128 };
804 /* Adapter gives
805 'F' -- use RRR bits 3,2
806 'E' -- 8kb 'D' -- 16kb
807 'C' -- 32kb 'A' -- 64KB
808 'B' - 64KB less 512 bytes at top
809 (WARNING ... must zero top bytes in INIT */
810
811 avail_sram_code = 0xf - readb(adapt_info->mmio + AIPAVAILSHRAM);
812 if (avail_sram_code) return size_code[avail_sram_code];
813 else /* for code 'F', must compute size from RRR(3,2) bits */
814 return 1 <<
815 ((readb(adapt_info->mmio+ACA_OFFSET+ACA_RW+RRR_ODD)>>2&3)+4);
816 }
817
818 /*****************************************************************************/
819
820 static const struct net_device_ops trdev_netdev_ops = {
821 .ndo_open = tok_open,
822 .ndo_stop = tok_close,
823 .ndo_start_xmit = tok_send_packet,
824 .ndo_set_multicast_list = tok_set_multicast_list,
825 .ndo_change_mtu = ibmtr_change_mtu,
826 };
827
828 static int __devinit trdev_init(struct net_device *dev)
829 {
830 struct tok_info *ti = netdev_priv(dev);
831
832 SET_PAGE(ti->srb_page);
833 ti->open_failure = NO ;
834 dev->netdev_ops = &trdev_netdev_ops;
835
836 return 0;
837 }
838
839 /*****************************************************************************/
840
841 static int tok_init_card(struct net_device *dev)
842 {
843 struct tok_info *ti;
844 short PIOaddr;
845 unsigned long i;
846
847 PIOaddr = dev->base_addr;
848 ti = netdev_priv(dev);
849 /* Special processing for first interrupt after reset */
850 ti->do_tok_int = FIRST_INT;
851 /* Reset adapter */
852 writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
853 outb(0, PIOaddr + ADAPTRESET);
854
855 schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
856
857 outb(0, PIOaddr + ADAPTRESETREL);
858 #ifdef ENABLE_PAGING
859 if (ti->page_mask)
860 writeb(SRPR_ENABLE_PAGING,ti->mmio+ACA_OFFSET+ACA_RW+SRPR_EVEN);
861 #endif
862 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
863 i = sleep_on_timeout(&ti->wait_for_reset, 4 * HZ);
864 return i? 0 : -EAGAIN;
865 }
866
867 /*****************************************************************************/
868 static int tok_open(struct net_device *dev)
869 {
870 struct tok_info *ti = netdev_priv(dev);
871 int i;
872
873 /*the case we were left in a failure state during a previous open */
874 if (ti->open_failure == YES) {
875 DPRINTK("Last time you were disconnected, how about now?\n");
876 printk("You can't insert with an ICS connector half-cocked.\n");
877 }
878
879 ti->open_status = CLOSED; /* CLOSED or OPEN */
880 ti->sap_status = CLOSED; /* CLOSED or OPEN */
881 ti->open_failure = NO; /* NO or YES */
882 ti->open_mode = MANUAL; /* MANUAL or AUTOMATIC */
883
884 ti->sram_phys &= ~1; /* to reverse what we do in tok_close */
885 /* init the spinlock */
886 spin_lock_init(&ti->lock);
887 init_timer(&ti->tr_timer);
888
889 i = tok_init_card(dev);
890 if (i) return i;
891
892 while (1){
893 tok_open_adapter((unsigned long) dev);
894 i= interruptible_sleep_on_timeout(&ti->wait_for_reset, 25 * HZ);
895 /* sig catch: estimate opening adapter takes more than .5 sec*/
896 if (i>(245*HZ)/10) break; /* fancier than if (i==25*HZ) */
897 if (i==0) break;
898 if (ti->open_status == OPEN && ti->sap_status==OPEN) {
899 netif_start_queue(dev);
900 DPRINTK("Adapter is up and running\n");
901 return 0;
902 }
903 i=schedule_timeout_interruptible(TR_RETRY_INTERVAL);
904 /* wait 30 seconds */
905 if(i!=0) break; /*prob. a signal, like the i>24*HZ case above */
906 }
907 outb(0, dev->base_addr + ADAPTRESET);/* kill pending interrupts*/
908 DPRINTK("TERMINATED via signal\n"); /*BMS useful */
909 return -EAGAIN;
910 }
911
912 /*****************************************************************************/
913
914 #define COMMAND_OFST 0
915 #define OPEN_OPTIONS_OFST 8
916 #define NUM_RCV_BUF_OFST 24
917 #define RCV_BUF_LEN_OFST 26
918 #define DHB_LENGTH_OFST 28
919 #define NUM_DHB_OFST 30
920 #define DLC_MAX_SAP_OFST 32
921 #define DLC_MAX_STA_OFST 33
922
923 static void tok_open_adapter(unsigned long dev_addr)
924 {
925 struct net_device *dev = (struct net_device *) dev_addr;
926 struct tok_info *ti;
927 int i;
928
929 ti = netdev_priv(dev);
930 SET_PAGE(ti->init_srb_page);
931 writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD);
932 for (i = 0; i < sizeof(struct dir_open_adapter); i++)
933 writeb(0, ti->init_srb + i);
934 writeb(DIR_OPEN_ADAPTER, ti->init_srb + COMMAND_OFST);
935 writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + OPEN_OPTIONS_OFST);
936 if (ti->ring_speed == 16) {
937 writew(htons(ti->dhb_size16mb), ti->init_srb + DHB_LENGTH_OFST);
938 writew(htons(ti->rbuf_cnt16), ti->init_srb + NUM_RCV_BUF_OFST);
939 writew(htons(ti->rbuf_len16), ti->init_srb + RCV_BUF_LEN_OFST);
940 } else {
941 writew(htons(ti->dhb_size4mb), ti->init_srb + DHB_LENGTH_OFST);
942 writew(htons(ti->rbuf_cnt4), ti->init_srb + NUM_RCV_BUF_OFST);
943 writew(htons(ti->rbuf_len4), ti->init_srb + RCV_BUF_LEN_OFST);
944 }
945 writeb(NUM_DHB, /* always 2 */ ti->init_srb + NUM_DHB_OFST);
946 writeb(DLC_MAX_SAP, ti->init_srb + DLC_MAX_SAP_OFST);
947 writeb(DLC_MAX_STA, ti->init_srb + DLC_MAX_STA_OFST);
948 ti->srb = ti->init_srb; /* We use this one in the interrupt handler */
949 ti->srb_page = ti->init_srb_page;
950 DPRINTK("Opening adapter: Xmit bfrs: %d X %d, Rcv bfrs: %d X %d\n",
951 readb(ti->init_srb + NUM_DHB_OFST),
952 ntohs(readw(ti->init_srb + DHB_LENGTH_OFST)),
953 ntohs(readw(ti->init_srb + NUM_RCV_BUF_OFST)),
954 ntohs(readw(ti->init_srb + RCV_BUF_LEN_OFST)));
955 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
956 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
957 }
958
959 /*****************************************************************************/
960
961 static void open_sap(unsigned char type, struct net_device *dev)
962 {
963 int i;
964 struct tok_info *ti = netdev_priv(dev);
965
966 SET_PAGE(ti->srb_page);
967 for (i = 0; i < sizeof(struct dlc_open_sap); i++)
968 writeb(0, ti->srb + i);
969
970 #define MAX_I_FIELD_OFST 14
971 #define SAP_VALUE_OFST 16
972 #define SAP_OPTIONS_OFST 17
973 #define STATION_COUNT_OFST 18
974
975 writeb(DLC_OPEN_SAP, ti->srb + COMMAND_OFST);
976 writew(htons(MAX_I_FIELD), ti->srb + MAX_I_FIELD_OFST);
977 writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb+ SAP_OPTIONS_OFST);
978 writeb(SAP_OPEN_STATION_CNT, ti->srb + STATION_COUNT_OFST);
979 writeb(type, ti->srb + SAP_VALUE_OFST);
980 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
981 }
982
983
984 /*****************************************************************************/
985
986 static void tok_set_multicast_list(struct net_device *dev)
987 {
988 struct tok_info *ti = netdev_priv(dev);
989 struct dev_mc_list *mclist;
990 unsigned char address[4];
991
992 int i;
993
994 /*BMS the next line is CRUCIAL or you may be sad when you */
995 /*BMS ifconfig tr down or hot unplug a PCMCIA card ??hownowbrowncow*/
996 if (/*BMSHELPdev->start == 0 ||*/ ti->open_status != OPEN) return;
997 address[0] = address[1] = address[2] = address[3] = 0;
998 mclist = dev->mc_list;
999 for (i = 0; i < dev->mc_count; i++) {
1000 address[0] |= mclist->dmi_addr[2];
1001 address[1] |= mclist->dmi_addr[3];
1002 address[2] |= mclist->dmi_addr[4];
1003 address[3] |= mclist->dmi_addr[5];
1004 mclist = mclist->next;
1005 }
1006 SET_PAGE(ti->srb_page);
1007 for (i = 0; i < sizeof(struct srb_set_funct_addr); i++)
1008 writeb(0, ti->srb + i);
1009
1010 #define FUNCT_ADDRESS_OFST 6
1011
1012 writeb(DIR_SET_FUNC_ADDR, ti->srb + COMMAND_OFST);
1013 for (i = 0; i < 4; i++)
1014 writeb(address[i], ti->srb + FUNCT_ADDRESS_OFST + i);
1015 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1016 #if TR_VERBOSE
1017 DPRINTK("Setting functional address: ");
1018 for (i=0;i<4;i++) printk("%02X ", address[i]);
1019 printk("\n");
1020 #endif
1021 }
1022
1023 /*****************************************************************************/
1024
1025 #define STATION_ID_OFST 4
1026
1027 static netdev_tx_t tok_send_packet(struct sk_buff *skb,
1028 struct net_device *dev)
1029 {
1030 struct tok_info *ti;
1031 unsigned long flags;
1032 ti = netdev_priv(dev);
1033
1034 netif_stop_queue(dev);
1035
1036 /* lock against other CPUs */
1037 spin_lock_irqsave(&(ti->lock), flags);
1038
1039 /* Save skb; we'll need it when the adapter asks for the data */
1040 ti->current_skb = skb;
1041 SET_PAGE(ti->srb_page);
1042 writeb(XMIT_UI_FRAME, ti->srb + COMMAND_OFST);
1043 writew(ti->exsap_station_id, ti->srb + STATION_ID_OFST);
1044 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1045 spin_unlock_irqrestore(&(ti->lock), flags);
1046 dev->trans_start = jiffies;
1047 return NETDEV_TX_OK;
1048 }
1049
1050 /*****************************************************************************/
1051
1052 static int tok_close(struct net_device *dev)
1053 {
1054 struct tok_info *ti = netdev_priv(dev);
1055
1056 /* Important for PCMCIA hot unplug, otherwise, we'll pull the card, */
1057 /* unloading the module from memory, and then if a timer pops, ouch */
1058 del_timer_sync(&ti->tr_timer);
1059 outb(0, dev->base_addr + ADAPTRESET);
1060 ti->sram_phys |= 1;
1061 ti->open_status = CLOSED;
1062
1063 netif_stop_queue(dev);
1064 DPRINTK("Adapter is closed.\n");
1065 return 0;
1066 }
1067
1068 /*****************************************************************************/
1069
1070 #define RETCODE_OFST 2
1071 #define OPEN_ERROR_CODE_OFST 6
1072 #define ASB_ADDRESS_OFST 8
1073 #define SRB_ADDRESS_OFST 10
1074 #define ARB_ADDRESS_OFST 12
1075 #define SSB_ADDRESS_OFST 14
1076
1077 static char *printphase[]= {"Lobe media test","Physical insertion",
1078 "Address verification","Roll call poll","Request Parameters"};
1079 static char *printerror[]={"Function failure","Signal loss","Reserved",
1080 "Frequency error","Timeout","Ring failure","Ring beaconing",
1081 "Duplicate node address",
1082 "Parameter request-retry count exceeded","Remove received",
1083 "IMPL force received","Duplicate modifier",
1084 "No monitor detected","Monitor contention failed for RPL"};
1085
1086 static void __iomem *map_address(struct tok_info *ti, unsigned index, __u8 *page)
1087 {
1088 if (ti->page_mask) {
1089 *page = (index >> 8) & ti->page_mask;
1090 index &= ~(ti->page_mask << 8);
1091 }
1092 return ti->sram_virt + index;
1093 }
1094
1095 static void dir_open_adapter (struct net_device *dev)
1096 {
1097 struct tok_info *ti = netdev_priv(dev);
1098 unsigned char ret_code;
1099 __u16 err;
1100
1101 ti->srb = map_address(ti,
1102 ntohs(readw(ti->init_srb + SRB_ADDRESS_OFST)),
1103 &ti->srb_page);
1104 ti->ssb = map_address(ti,
1105 ntohs(readw(ti->init_srb + SSB_ADDRESS_OFST)),
1106 &ti->ssb_page);
1107 ti->arb = map_address(ti,
1108 ntohs(readw(ti->init_srb + ARB_ADDRESS_OFST)),
1109 &ti->arb_page);
1110 ti->asb = map_address(ti,
1111 ntohs(readw(ti->init_srb + ASB_ADDRESS_OFST)),
1112 &ti->asb_page);
1113 ti->current_skb = NULL;
1114 ret_code = readb(ti->init_srb + RETCODE_OFST);
1115 err = ntohs(readw(ti->init_srb + OPEN_ERROR_CODE_OFST));
1116 if (!ret_code) {
1117 ti->open_status = OPEN; /* TR adapter is now available */
1118 if (ti->open_mode == AUTOMATIC) {
1119 DPRINTK("Adapter reopened.\n");
1120 }
1121 writeb(~SRB_RESP_INT, ti->mmio+ACA_OFFSET+ACA_RESET+ISRP_ODD);
1122 open_sap(EXTENDED_SAP, dev);
1123 return;
1124 }
1125 ti->open_failure = YES;
1126 if (ret_code == 7){
1127 if (err == 0x24) {
1128 if (!ti->auto_speedsave) {
1129 DPRINTK("Open failed: Adapter speed must match "
1130 "ring speed if Automatic Ring Speed Save is "
1131 "disabled.\n");
1132 ti->open_action = FAIL;
1133 }else
1134 DPRINTK("Retrying open to adjust to "
1135 "ring speed, ");
1136 } else if (err == 0x2d) {
1137 DPRINTK("Physical Insertion: No Monitor Detected, ");
1138 printk("retrying after %ds delay...\n",
1139 TR_RETRY_INTERVAL/HZ);
1140 } else if (err == 0x11) {
1141 DPRINTK("Lobe Media Function Failure (0x11), ");
1142 printk(" retrying after %ds delay...\n",
1143 TR_RETRY_INTERVAL/HZ);
1144 } else {
1145 char **prphase = printphase;
1146 char **prerror = printerror;
1147 DPRINTK("TR Adapter misc open failure, error code = ");
1148 printk("0x%x, Phase: %s, Error: %s\n",
1149 err, prphase[err/16 -1], prerror[err%16 -1]);
1150 printk(" retrying after %ds delay...\n",
1151 TR_RETRY_INTERVAL/HZ);
1152 }
1153 } else DPRINTK("open failed: ret_code = %02X..., ", ret_code);
1154 if (ti->open_action != FAIL) {
1155 if (ti->open_mode==AUTOMATIC){
1156 ti->open_action = REOPEN;
1157 ibmtr_reset_timer(&(ti->tr_timer), dev);
1158 return;
1159 }
1160 wake_up(&ti->wait_for_reset);
1161 return;
1162 }
1163 DPRINTK("FAILURE, CAPUT\n");
1164 }
1165
1166 /******************************************************************************/
1167
1168 static irqreturn_t tok_interrupt(int irq, void *dev_id)
1169 {
1170 unsigned char status;
1171 /* unsigned char status_even ; */
1172 struct tok_info *ti;
1173 struct net_device *dev;
1174 #ifdef ENABLE_PAGING
1175 unsigned char save_srpr;
1176 #endif
1177
1178 dev = dev_id;
1179 #if TR_VERBOSE
1180 DPRINTK("Int from tok_driver, dev : %p irq%d\n", dev,irq);
1181 #endif
1182 ti = netdev_priv(dev);
1183 if (ti->sram_phys & 1)
1184 return IRQ_NONE; /* PCMCIA card extraction flag */
1185 spin_lock(&(ti->lock));
1186 #ifdef ENABLE_PAGING
1187 save_srpr = readb(ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1188 #endif
1189
1190 /* Disable interrupts till processing is finished */
1191 writeb((~INT_ENABLE), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1192
1193 /* Reset interrupt for ISA boards */
1194 if (ti->adapter_int_enable)
1195 outb(0, ti->adapter_int_enable);
1196 else /* used for PCMCIA cards */
1197 outb(0, ti->global_int_enable);
1198 if (ti->do_tok_int == FIRST_INT){
1199 initial_tok_int(dev);
1200 #ifdef ENABLE_PAGING
1201 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1202 #endif
1203 spin_unlock(&(ti->lock));
1204 return IRQ_HANDLED;
1205 }
1206 /* Begin interrupt handler HERE inline to avoid the extra
1207 levels of logic and call depth for the original solution. */
1208 status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_ODD);
1209 /*BMSstatus_even = readb (ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) */
1210 /*BMSdebugprintk("tok_interrupt: ISRP_ODD = 0x%x ISRP_EVEN = 0x%x\n", */
1211 /*BMS status,status_even); */
1212
1213 if (status & ADAP_CHK_INT) {
1214 int i;
1215 void __iomem *check_reason;
1216 __u8 check_reason_page = 0;
1217 check_reason = map_address(ti,
1218 ntohs(readw(ti->mmio+ ACA_OFFSET+ACA_RW + WWCR_EVEN)),
1219 &check_reason_page);
1220 SET_PAGE(check_reason_page);
1221
1222 DPRINTK("Adapter check interrupt\n");
1223 DPRINTK("8 reason bytes follow: ");
1224 for (i = 0; i < 8; i++, check_reason++)
1225 printk("%02X ", (int) readb(check_reason));
1226 printk("\n");
1227 writeb(~ADAP_CHK_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1228 status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRA_EVEN);
1229 DPRINTK("ISRA_EVEN == 0x02%x\n",status);
1230 ti->open_status = CLOSED;
1231 ti->sap_status = CLOSED;
1232 ti->open_mode = AUTOMATIC;
1233 netif_carrier_off(dev);
1234 netif_stop_queue(dev);
1235 ti->open_action = RESTART;
1236 outb(0, dev->base_addr + ADAPTRESET);
1237 ibmtr_reset_timer(&(ti->tr_timer), dev);/*BMS try to reopen*/
1238 spin_unlock(&(ti->lock));
1239 return IRQ_HANDLED;
1240 }
1241 if (readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN)
1242 & (TCR_INT | ERR_INT | ACCESS_INT)) {
1243 DPRINTK("adapter error: ISRP_EVEN : %02x\n",
1244 (int)readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRP_EVEN));
1245 writeb(~(TCR_INT | ERR_INT | ACCESS_INT),
1246 ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1247 status= readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRA_EVEN);/*BMS*/
1248 DPRINTK("ISRA_EVEN == 0x02%x\n",status);/*BMS*/
1249 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1250 #ifdef ENABLE_PAGING
1251 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1252 #endif
1253 spin_unlock(&(ti->lock));
1254 return IRQ_HANDLED;
1255 }
1256 if (status & SRB_RESP_INT) { /* SRB response */
1257 SET_PAGE(ti->srb_page);
1258 #if TR_VERBOSE
1259 DPRINTK("SRB resp: cmd=%02X rsp=%02X\n",
1260 readb(ti->srb), readb(ti->srb + RETCODE_OFST));
1261 #endif
1262 switch (readb(ti->srb)) { /* SRB command check */
1263 case XMIT_DIR_FRAME:{
1264 unsigned char xmit_ret_code;
1265 xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1266 if (xmit_ret_code == 0xff) break;
1267 DPRINTK("error on xmit_dir_frame request: %02X\n",
1268 xmit_ret_code);
1269 if (ti->current_skb) {
1270 dev_kfree_skb_irq(ti->current_skb);
1271 ti->current_skb = NULL;
1272 }
1273 /*dev->tbusy = 0;*/
1274 netif_wake_queue(dev);
1275 if (ti->readlog_pending)
1276 ibmtr_readlog(dev);
1277 break;
1278 }
1279 case XMIT_UI_FRAME:{
1280 unsigned char xmit_ret_code;
1281
1282 xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1283 if (xmit_ret_code == 0xff) break;
1284 DPRINTK("error on xmit_ui_frame request: %02X\n",
1285 xmit_ret_code);
1286 if (ti->current_skb) {
1287 dev_kfree_skb_irq(ti->current_skb);
1288 ti->current_skb = NULL;
1289 }
1290 netif_wake_queue(dev);
1291 if (ti->readlog_pending)
1292 ibmtr_readlog(dev);
1293 break;
1294 }
1295 case DIR_OPEN_ADAPTER:
1296 dir_open_adapter(dev);
1297 break;
1298 case DLC_OPEN_SAP:
1299 if (readb(ti->srb + RETCODE_OFST)) {
1300 DPRINTK("open_sap failed: ret_code = %02X, "
1301 "retrying\n",
1302 (int) readb(ti->srb + RETCODE_OFST));
1303 ti->open_action = REOPEN;
1304 ibmtr_reset_timer(&(ti->tr_timer), dev);
1305 break;
1306 }
1307 ti->exsap_station_id = readw(ti->srb + STATION_ID_OFST);
1308 ti->sap_status = OPEN;/* TR adapter is now available */
1309 if (ti->open_mode==MANUAL){
1310 wake_up(&ti->wait_for_reset);
1311 break;
1312 }
1313 netif_wake_queue(dev);
1314 netif_carrier_on(dev);
1315 break;
1316 case DIR_INTERRUPT:
1317 case DIR_MOD_OPEN_PARAMS:
1318 case DIR_SET_GRP_ADDR:
1319 case DIR_SET_FUNC_ADDR:
1320 case DLC_CLOSE_SAP:
1321 if (readb(ti->srb + RETCODE_OFST))
1322 DPRINTK("error on %02X: %02X\n",
1323 (int) readb(ti->srb + COMMAND_OFST),
1324 (int) readb(ti->srb + RETCODE_OFST));
1325 break;
1326 case DIR_READ_LOG:
1327 if (readb(ti->srb + RETCODE_OFST)){
1328 DPRINTK("error on dir_read_log: %02X\n",
1329 (int) readb(ti->srb + RETCODE_OFST));
1330 netif_wake_queue(dev);
1331 break;
1332 }
1333 #if IBMTR_DEBUG_MESSAGES
1334
1335 #define LINE_ERRORS_OFST 0
1336 #define INTERNAL_ERRORS_OFST 1
1337 #define BURST_ERRORS_OFST 2
1338 #define AC_ERRORS_OFST 3
1339 #define ABORT_DELIMITERS_OFST 4
1340 #define LOST_FRAMES_OFST 6
1341 #define RECV_CONGEST_COUNT_OFST 7
1342 #define FRAME_COPIED_ERRORS_OFST 8
1343 #define FREQUENCY_ERRORS_OFST 9
1344 #define TOKEN_ERRORS_OFST 10
1345
1346 DPRINTK("Line errors %02X, Internal errors %02X, "
1347 "Burst errors %02X\n" "A/C errors %02X, "
1348 "Abort delimiters %02X, Lost frames %02X\n"
1349 "Receive congestion count %02X, "
1350 "Frame copied errors %02X\nFrequency errors %02X, "
1351 "Token errors %02X\n",
1352 (int) readb(ti->srb + LINE_ERRORS_OFST),
1353 (int) readb(ti->srb + INTERNAL_ERRORS_OFST),
1354 (int) readb(ti->srb + BURST_ERRORS_OFST),
1355 (int) readb(ti->srb + AC_ERRORS_OFST),
1356 (int) readb(ti->srb + ABORT_DELIMITERS_OFST),
1357 (int) readb(ti->srb + LOST_FRAMES_OFST),
1358 (int) readb(ti->srb + RECV_CONGEST_COUNT_OFST),
1359 (int) readb(ti->srb + FRAME_COPIED_ERRORS_OFST),
1360 (int) readb(ti->srb + FREQUENCY_ERRORS_OFST),
1361 (int) readb(ti->srb + TOKEN_ERRORS_OFST));
1362 #endif
1363 netif_wake_queue(dev);
1364 break;
1365 default:
1366 DPRINTK("Unknown command %02X encountered\n",
1367 (int) readb(ti->srb));
1368 } /* end switch SRB command check */
1369 writeb(~SRB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1370 } /* if SRB response */
1371 if (status & ASB_FREE_INT) { /* ASB response */
1372 SET_PAGE(ti->asb_page);
1373 #if TR_VERBOSE
1374 DPRINTK("ASB resp: cmd=%02X\n", readb(ti->asb));
1375 #endif
1376
1377 switch (readb(ti->asb)) { /* ASB command check */
1378 case REC_DATA:
1379 case XMIT_UI_FRAME:
1380 case XMIT_DIR_FRAME:
1381 break;
1382 default:
1383 DPRINTK("unknown command in asb %02X\n",
1384 (int) readb(ti->asb));
1385 } /* switch ASB command check */
1386 if (readb(ti->asb + 2) != 0xff) /* checks ret_code */
1387 DPRINTK("ASB error %02X in cmd %02X\n",
1388 (int) readb(ti->asb + 2), (int) readb(ti->asb));
1389 writeb(~ASB_FREE_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1390 } /* if ASB response */
1391
1392 #define STATUS_OFST 6
1393 #define NETW_STATUS_OFST 6
1394
1395 if (status & ARB_CMD_INT) { /* ARB response */
1396 SET_PAGE(ti->arb_page);
1397 #if TR_VERBOSE
1398 DPRINTK("ARB resp: cmd=%02X\n", readb(ti->arb));
1399 #endif
1400
1401 switch (readb(ti->arb)) { /* ARB command check */
1402 case DLC_STATUS:
1403 DPRINTK("DLC_STATUS new status: %02X on station %02X\n",
1404 ntohs(readw(ti->arb + STATUS_OFST)),
1405 ntohs(readw(ti->arb+ STATION_ID_OFST)));
1406 break;
1407 case REC_DATA:
1408 tr_rx(dev);
1409 break;
1410 case RING_STAT_CHANGE:{
1411 unsigned short ring_status;
1412 ring_status= ntohs(readw(ti->arb + NETW_STATUS_OFST));
1413 if (ibmtr_debug_trace & TRC_INIT)
1414 DPRINTK("Ring Status Change...(0x%x)\n",
1415 ring_status);
1416 if(ring_status& (REMOVE_RECV|AUTO_REMOVAL|LOBE_FAULT)){
1417 netif_stop_queue(dev);
1418 netif_carrier_off(dev);
1419 DPRINTK("Remove received, or Auto-removal error"
1420 ", or Lobe fault\n");
1421 DPRINTK("We'll try to reopen the closed adapter"
1422 " after a %d second delay.\n",
1423 TR_RETRY_INTERVAL/HZ);
1424 /*I was confused: I saw the TR reopening but */
1425 /*forgot:with an RJ45 in an RJ45/ICS adapter */
1426 /*but adapter not in the ring, the TR will */
1427 /* open, and then soon close and come here. */
1428 ti->open_mode = AUTOMATIC;
1429 ti->open_status = CLOSED; /*12/2000 BMS*/
1430 ti->open_action = REOPEN;
1431 ibmtr_reset_timer(&(ti->tr_timer), dev);
1432 } else if (ring_status & LOG_OVERFLOW) {
1433 if(netif_queue_stopped(dev))
1434 ti->readlog_pending = 1;
1435 else
1436 ibmtr_readlog(dev);
1437 }
1438 break;
1439 }
1440 case XMIT_DATA_REQ:
1441 tr_tx(dev);
1442 break;
1443 default:
1444 DPRINTK("Unknown command %02X in arb\n",
1445 (int) readb(ti->arb));
1446 break;
1447 } /* switch ARB command check */
1448 writeb(~ARB_CMD_INT, ti->mmio+ ACA_OFFSET+ACA_RESET + ISRP_ODD);
1449 writeb(ARB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1450 } /* if ARB response */
1451 if (status & SSB_RESP_INT) { /* SSB response */
1452 unsigned char retcode;
1453 SET_PAGE(ti->ssb_page);
1454 #if TR_VERBOSE
1455 DPRINTK("SSB resp: cmd=%02X rsp=%02X\n",
1456 readb(ti->ssb), readb(ti->ssb + 2));
1457 #endif
1458
1459 switch (readb(ti->ssb)) { /* SSB command check */
1460 case XMIT_DIR_FRAME:
1461 case XMIT_UI_FRAME:
1462 retcode = readb(ti->ssb + 2);
1463 if (retcode && (retcode != 0x22))/* checks ret_code */
1464 DPRINTK("xmit ret_code: %02X xmit error code: "
1465 "%02X\n",
1466 (int)retcode, (int)readb(ti->ssb + 6));
1467 else
1468 dev->stats.tx_packets++;
1469 break;
1470 case XMIT_XID_CMD:
1471 DPRINTK("xmit xid ret_code: %02X\n",
1472 (int) readb(ti->ssb + 2));
1473 default:
1474 DPRINTK("Unknown command %02X in ssb\n",
1475 (int) readb(ti->ssb));
1476 } /* SSB command check */
1477 writeb(~SSB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1478 writeb(SSB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1479 } /* if SSB response */
1480 #ifdef ENABLE_PAGING
1481 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1482 #endif
1483 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1484 spin_unlock(&(ti->lock));
1485 return IRQ_HANDLED;
1486 } /*tok_interrupt */
1487
1488 /*****************************************************************************/
1489
1490 #define INIT_STATUS_OFST 1
1491 #define INIT_STATUS_2_OFST 2
1492 #define ENCODED_ADDRESS_OFST 8
1493
1494 static void initial_tok_int(struct net_device *dev)
1495 {
1496
1497 __u32 encoded_addr, hw_encoded_addr;
1498 struct tok_info *ti;
1499 unsigned char init_status; /*BMS 12/2000*/
1500
1501 ti = netdev_priv(dev);
1502
1503 ti->do_tok_int = NOT_FIRST;
1504
1505 /* we assign the shared-ram address for ISA devices */
1506 writeb(ti->sram_base, ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN);
1507 #ifndef PCMCIA
1508 ti->sram_virt = ioremap(((__u32)ti->sram_base << 12), ti->avail_shared_ram);
1509 #endif
1510 ti->init_srb = map_address(ti,
1511 ntohs(readw(ti->mmio + ACA_OFFSET + WRBR_EVEN)),
1512 &ti->init_srb_page);
1513 if (ti->page_mask && ti->avail_shared_ram == 127) {
1514 void __iomem *last_512;
1515 __u8 last_512_page=0;
1516 int i;
1517 last_512 = map_address(ti, 0xfe00, &last_512_page);
1518 /* initialize high section of ram (if necessary) */
1519 SET_PAGE(last_512_page);
1520 for (i = 0; i < 512; i++)
1521 writeb(0, last_512 + i);
1522 }
1523 SET_PAGE(ti->init_srb_page);
1524
1525 #if TR_VERBOSE
1526 {
1527 int i;
1528
1529 DPRINTK("ti->init_srb_page=0x%x\n", ti->init_srb_page);
1530 DPRINTK("init_srb(%p):", ti->init_srb );
1531 for (i = 0; i < 20; i++)
1532 printk("%02X ", (int) readb(ti->init_srb + i));
1533 printk("\n");
1534 }
1535 #endif
1536
1537 hw_encoded_addr = readw(ti->init_srb + ENCODED_ADDRESS_OFST);
1538 encoded_addr = ntohs(hw_encoded_addr);
1539 init_status= /*BMS 12/2000 check for shallow mode possibility (Turbo)*/
1540 readb(ti->init_srb+offsetof(struct srb_init_response,init_status));
1541 /*printk("Initial interrupt: init_status= 0x%02x\n",init_status);*/
1542 ti->ring_speed = init_status & 0x01 ? 16 : 4;
1543 DPRINTK("Initial interrupt : %d Mbps, shared RAM base %08x.\n",
1544 ti->ring_speed, (unsigned int)dev->mem_start);
1545 ti->auto_speedsave = (readb(ti->init_srb+INIT_STATUS_2_OFST) & 4) != 0;
1546
1547 if (ti->open_mode == MANUAL) wake_up(&ti->wait_for_reset);
1548 else tok_open_adapter((unsigned long)dev);
1549
1550 } /*initial_tok_int() */
1551
1552 /*****************************************************************************/
1553
1554 #define CMD_CORRELATE_OFST 1
1555 #define DHB_ADDRESS_OFST 6
1556
1557 #define FRAME_LENGTH_OFST 6
1558 #define HEADER_LENGTH_OFST 8
1559 #define RSAP_VALUE_OFST 9
1560
1561 static void tr_tx(struct net_device *dev)
1562 {
1563 struct tok_info *ti = netdev_priv(dev);
1564 struct trh_hdr *trhdr = (struct trh_hdr *) ti->current_skb->data;
1565 unsigned int hdr_len;
1566 __u32 dhb=0,dhb_base;
1567 void __iomem *dhbuf = NULL;
1568 unsigned char xmit_command;
1569 int i,dhb_len=0x4000,src_len,src_offset;
1570 struct trllc *llc;
1571 struct srb_xmit xsrb;
1572 __u8 dhb_page = 0;
1573 __u8 llc_ssap;
1574
1575 SET_PAGE(ti->asb_page);
1576
1577 if (readb(ti->asb+RETCODE_OFST) != 0xFF) DPRINTK("ASB not free !!!\n");
1578
1579 /* in providing the transmit interrupts, is telling us it is ready for
1580 data and providing a shared memory address for us to stuff with data.
1581 Here we compute the effective address where we will place data.
1582 */
1583 SET_PAGE(ti->arb_page);
1584 dhb=dhb_base=ntohs(readw(ti->arb + DHB_ADDRESS_OFST));
1585 if (ti->page_mask) {
1586 dhb_page = (dhb_base >> 8) & ti->page_mask;
1587 dhb=dhb_base & ~(ti->page_mask << 8);
1588 }
1589 dhbuf = ti->sram_virt + dhb;
1590
1591 /* Figure out the size of the 802.5 header */
1592 if (!(trhdr->saddr[0] & 0x80)) /* RIF present? */
1593 hdr_len = sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1594 else
1595 hdr_len = ((ntohs(trhdr->rcf) & TR_RCF_LEN_MASK) >> 8)
1596 + sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1597
1598 llc = (struct trllc *) (ti->current_skb->data + hdr_len);
1599
1600 llc_ssap = llc->ssap;
1601 SET_PAGE(ti->srb_page);
1602 memcpy_fromio(&xsrb, ti->srb, sizeof(xsrb));
1603 SET_PAGE(ti->asb_page);
1604 xmit_command = xsrb.command;
1605
1606 writeb(xmit_command, ti->asb + COMMAND_OFST);
1607 writew(xsrb.station_id, ti->asb + STATION_ID_OFST);
1608 writeb(llc_ssap, ti->asb + RSAP_VALUE_OFST);
1609 writeb(xsrb.cmd_corr, ti->asb + CMD_CORRELATE_OFST);
1610 writeb(0, ti->asb + RETCODE_OFST);
1611 if ((xmit_command == XMIT_XID_CMD) || (xmit_command == XMIT_TEST_CMD)) {
1612 writew(htons(0x11), ti->asb + FRAME_LENGTH_OFST);
1613 writeb(0x0e, ti->asb + HEADER_LENGTH_OFST);
1614 SET_PAGE(dhb_page);
1615 writeb(AC, dhbuf);
1616 writeb(LLC_FRAME, dhbuf + 1);
1617 for (i = 0; i < TR_ALEN; i++)
1618 writeb((int) 0x0FF, dhbuf + i + 2);
1619 for (i = 0; i < TR_ALEN; i++)
1620 writeb(0, dhbuf + i + TR_ALEN + 2);
1621 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1622 return;
1623 }
1624 /*
1625 * the token ring packet is copied from sk_buff to the adapter
1626 * buffer identified in the command data received with the interrupt.
1627 */
1628 writeb(hdr_len, ti->asb + HEADER_LENGTH_OFST);
1629 writew(htons(ti->current_skb->len), ti->asb + FRAME_LENGTH_OFST);
1630 src_len=ti->current_skb->len;
1631 src_offset=0;
1632 dhb=dhb_base;
1633 while(1) {
1634 if (ti->page_mask) {
1635 dhb_page=(dhb >> 8) & ti->page_mask;
1636 dhb=dhb & ~(ti->page_mask << 8);
1637 dhb_len=0x4000-dhb; /* remaining size of this page */
1638 }
1639 dhbuf = ti->sram_virt + dhb;
1640 SET_PAGE(dhb_page);
1641 if (src_len > dhb_len) {
1642 memcpy_toio(dhbuf,&ti->current_skb->data[src_offset],
1643 dhb_len);
1644 src_len -= dhb_len;
1645 src_offset += dhb_len;
1646 dhb_base+=dhb_len;
1647 dhb=dhb_base;
1648 continue;
1649 }
1650 memcpy_toio(dhbuf, &ti->current_skb->data[src_offset], src_len);
1651 break;
1652 }
1653 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1654 dev->stats.tx_bytes += ti->current_skb->len;
1655 dev_kfree_skb_irq(ti->current_skb);
1656 ti->current_skb = NULL;
1657 netif_wake_queue(dev);
1658 if (ti->readlog_pending)
1659 ibmtr_readlog(dev);
1660 } /*tr_tx */
1661
1662 /*****************************************************************************/
1663
1664
1665 #define RECEIVE_BUFFER_OFST 6
1666 #define LAN_HDR_LENGTH_OFST 8
1667 #define DLC_HDR_LENGTH_OFST 9
1668
1669 #define DSAP_OFST 0
1670 #define SSAP_OFST 1
1671 #define LLC_OFST 2
1672 #define PROTID_OFST 3
1673 #define ETHERTYPE_OFST 6
1674
1675 static void tr_rx(struct net_device *dev)
1676 {
1677 struct tok_info *ti = netdev_priv(dev);
1678 __u32 rbuffer;
1679 void __iomem *rbuf, *rbufdata, *llc;
1680 __u8 rbuffer_page = 0;
1681 unsigned char *data;
1682 unsigned int rbuffer_len, lan_hdr_len, hdr_len, ip_len, length;
1683 unsigned char dlc_hdr_len;
1684 struct sk_buff *skb;
1685 unsigned int skb_size = 0;
1686 int IPv4_p = 0;
1687 unsigned int chksum = 0;
1688 struct iphdr *iph;
1689 struct arb_rec_req rarb;
1690
1691 SET_PAGE(ti->arb_page);
1692 memcpy_fromio(&rarb, ti->arb, sizeof(rarb));
1693 rbuffer = ntohs(rarb.rec_buf_addr) ;
1694 rbuf = map_address(ti, rbuffer, &rbuffer_page);
1695
1696 SET_PAGE(ti->asb_page);
1697
1698 if (readb(ti->asb + RETCODE_OFST) !=0xFF) DPRINTK("ASB not free !!!\n");
1699
1700 writeb(REC_DATA, ti->asb + COMMAND_OFST);
1701 writew(rarb.station_id, ti->asb + STATION_ID_OFST);
1702 writew(rarb.rec_buf_addr, ti->asb + RECEIVE_BUFFER_OFST);
1703
1704 lan_hdr_len = rarb.lan_hdr_len;
1705 if (lan_hdr_len > sizeof(struct trh_hdr)) {
1706 DPRINTK("Linux cannot handle greater than 18 bytes RIF\n");
1707 return;
1708 } /*BMS I added this above just to be very safe */
1709 dlc_hdr_len = readb(ti->arb + DLC_HDR_LENGTH_OFST);
1710 hdr_len = lan_hdr_len + sizeof(struct trllc) + sizeof(struct iphdr);
1711
1712 SET_PAGE(rbuffer_page);
1713 llc = rbuf + offsetof(struct rec_buf, data) + lan_hdr_len;
1714
1715 #if TR_VERBOSE
1716 DPRINTK("offsetof data: %02X lan_hdr_len: %02X\n",
1717 (__u32) offsetof(struct rec_buf, data), (unsigned int) lan_hdr_len);
1718 DPRINTK("llc: %08X rec_buf_addr: %04X dev->mem_start: %lX\n",
1719 llc, ntohs(rarb.rec_buf_addr), dev->mem_start);
1720 DPRINTK("dsap: %02X, ssap: %02X, llc: %02X, protid: %02X%02X%02X, "
1721 "ethertype: %04X\n",
1722 (int) readb(llc + DSAP_OFST), (int) readb(llc + SSAP_OFST),
1723 (int) readb(llc + LLC_OFST), (int) readb(llc + PROTID_OFST),
1724 (int) readb(llc+PROTID_OFST+1),(int)readb(llc+PROTID_OFST + 2),
1725 (int) ntohs(readw(llc + ETHERTYPE_OFST)));
1726 #endif
1727 if (readb(llc + offsetof(struct trllc, llc)) != UI_CMD) {
1728 SET_PAGE(ti->asb_page);
1729 writeb(DATA_LOST, ti->asb + RETCODE_OFST);
1730 dev->stats.rx_dropped++;
1731 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1732 return;
1733 }
1734 length = ntohs(rarb.frame_len);
1735 if (readb(llc + DSAP_OFST) == EXTENDED_SAP &&
1736 readb(llc + SSAP_OFST) == EXTENDED_SAP &&
1737 length >= hdr_len) IPv4_p = 1;
1738 #if TR_VERBOSE
1739 #define SADDR_OFST 8
1740 #define DADDR_OFST 2
1741
1742 if (!IPv4_p) {
1743
1744 void __iomem *trhhdr = rbuf + offsetof(struct rec_buf, data);
1745 u8 saddr[6];
1746 u8 daddr[6];
1747 int i;
1748 for (i = 0 ; i < 6 ; i++)
1749 saddr[i] = readb(trhhdr + SADDR_OFST + i);
1750 for (i = 0 ; i < 6 ; i++)
1751 daddr[i] = readb(trhhdr + DADDR_OFST + i);
1752 DPRINTK("Probably non-IP frame received.\n");
1753 DPRINTK("ssap: %02X dsap: %02X "
1754 "saddr: %pM daddr: %pM\n",
1755 readb(llc + SSAP_OFST), readb(llc + DSAP_OFST),
1756 saddr, daddr);
1757 }
1758 #endif
1759
1760 /*BMS handle the case she comes in with few hops but leaves with many */
1761 skb_size=length-lan_hdr_len+sizeof(struct trh_hdr)+sizeof(struct trllc);
1762
1763 if (!(skb = dev_alloc_skb(skb_size))) {
1764 DPRINTK("out of memory. frame dropped.\n");
1765 dev->stats.rx_dropped++;
1766 SET_PAGE(ti->asb_page);
1767 writeb(DATA_LOST, ti->asb + offsetof(struct asb_rec, ret_code));
1768 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1769 return;
1770 }
1771 /*BMS again, if she comes in with few but leaves with many */
1772 skb_reserve(skb, sizeof(struct trh_hdr) - lan_hdr_len);
1773 skb_put(skb, length);
1774 data = skb->data;
1775 rbuffer_len = ntohs(readw(rbuf + offsetof(struct rec_buf, buf_len)));
1776 rbufdata = rbuf + offsetof(struct rec_buf, data);
1777
1778 if (IPv4_p) {
1779 /* Copy the headers without checksumming */
1780 memcpy_fromio(data, rbufdata, hdr_len);
1781
1782 /* Watch for padded packets and bogons */
1783 iph= (struct iphdr *)(data+ lan_hdr_len + sizeof(struct trllc));
1784 ip_len = ntohs(iph->tot_len) - sizeof(struct iphdr);
1785 length -= hdr_len;
1786 if ((ip_len <= length) && (ip_len > 7))
1787 length = ip_len;
1788 data += hdr_len;
1789 rbuffer_len -= hdr_len;
1790 rbufdata += hdr_len;
1791 }
1792 /* Copy the payload... */
1793 #define BUFFER_POINTER_OFST 2
1794 #define BUFFER_LENGTH_OFST 6
1795 for (;;) {
1796 if (ibmtr_debug_trace&TRC_INITV && length < rbuffer_len)
1797 DPRINTK("CURIOUS, length=%d < rbuffer_len=%d\n",
1798 length,rbuffer_len);
1799 if (IPv4_p)
1800 chksum=csum_partial_copy_nocheck((void*)rbufdata,
1801 data,length<rbuffer_len?length:rbuffer_len,chksum);
1802 else
1803 memcpy_fromio(data, rbufdata, rbuffer_len);
1804 rbuffer = ntohs(readw(rbuf+BUFFER_POINTER_OFST)) ;
1805 if (!rbuffer)
1806 break;
1807 rbuffer -= 2;
1808 length -= rbuffer_len;
1809 data += rbuffer_len;
1810 rbuf = map_address(ti, rbuffer, &rbuffer_page);
1811 SET_PAGE(rbuffer_page);
1812 rbuffer_len = ntohs(readw(rbuf + BUFFER_LENGTH_OFST));
1813 rbufdata = rbuf + offsetof(struct rec_buf, data);
1814 }
1815
1816 SET_PAGE(ti->asb_page);
1817 writeb(0, ti->asb + offsetof(struct asb_rec, ret_code));
1818
1819 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1820
1821 dev->stats.rx_bytes += skb->len;
1822 dev->stats.rx_packets++;
1823
1824 skb->protocol = tr_type_trans(skb, dev);
1825 if (IPv4_p) {
1826 skb->csum = chksum;
1827 skb->ip_summed = CHECKSUM_COMPLETE;
1828 }
1829 netif_rx(skb);
1830 } /*tr_rx */
1831
1832 /*****************************************************************************/
1833
1834 static void ibmtr_reset_timer(struct timer_list *tmr, struct net_device *dev)
1835 {
1836 tmr->expires = jiffies + TR_RETRY_INTERVAL;
1837 tmr->data = (unsigned long) dev;
1838 tmr->function = tok_rerun;
1839 init_timer(tmr);
1840 add_timer(tmr);
1841 }
1842
1843 /*****************************************************************************/
1844
1845 static void tok_rerun(unsigned long dev_addr)
1846 {
1847 struct net_device *dev = (struct net_device *)dev_addr;
1848 struct tok_info *ti = netdev_priv(dev);
1849
1850 if ( ti->open_action == RESTART){
1851 ti->do_tok_int = FIRST_INT;
1852 outb(0, dev->base_addr + ADAPTRESETREL);
1853 #ifdef ENABLE_PAGING
1854 if (ti->page_mask)
1855 writeb(SRPR_ENABLE_PAGING,
1856 ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1857 #endif
1858
1859 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1860 } else
1861 tok_open_adapter(dev_addr);
1862 }
1863
1864 /*****************************************************************************/
1865
1866 static void ibmtr_readlog(struct net_device *dev)
1867 {
1868 struct tok_info *ti;
1869
1870 ti = netdev_priv(dev);
1871
1872 ti->readlog_pending = 0;
1873 SET_PAGE(ti->srb_page);
1874 writeb(DIR_READ_LOG, ti->srb);
1875 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1876 writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1877
1878 netif_stop_queue(dev);
1879
1880 }
1881
1882 /*****************************************************************************/
1883
1884 static int ibmtr_change_mtu(struct net_device *dev, int mtu)
1885 {
1886 struct tok_info *ti = netdev_priv(dev);
1887
1888 if (ti->ring_speed == 16 && mtu > ti->maxmtu16)
1889 return -EINVAL;
1890 if (ti->ring_speed == 4 && mtu > ti->maxmtu4)
1891 return -EINVAL;
1892 dev->mtu = mtu;
1893 return 0;
1894 }
1895
1896 /*****************************************************************************/
1897 #ifdef MODULE
1898
1899 /* 3COM 3C619C supports 8 interrupts, 32 I/O ports */
1900 static struct net_device *dev_ibmtr[IBMTR_MAX_ADAPTERS];
1901 static int io[IBMTR_MAX_ADAPTERS] = { 0xa20, 0xa24 };
1902 static int irq[IBMTR_MAX_ADAPTERS];
1903 static int mem[IBMTR_MAX_ADAPTERS];
1904
1905 MODULE_LICENSE("GPL");
1906
1907 module_param_array(io, int, NULL, 0);
1908 module_param_array(irq, int, NULL, 0);
1909 module_param_array(mem, int, NULL, 0);
1910
1911 static int __init ibmtr_init(void)
1912 {
1913 int i;
1914 int count=0;
1915
1916 find_turbo_adapters(io);
1917
1918 for (i = 0; i < IBMTR_MAX_ADAPTERS && io[i]; i++) {
1919 struct net_device *dev;
1920 irq[i] = 0;
1921 mem[i] = 0;
1922 dev = alloc_trdev(sizeof(struct tok_info));
1923 if (dev == NULL) {
1924 if (i == 0)
1925 return -ENOMEM;
1926 break;
1927 }
1928 dev->base_addr = io[i];
1929 dev->irq = irq[i];
1930 dev->mem_start = mem[i];
1931
1932 if (ibmtr_probe_card(dev)) {
1933 free_netdev(dev);
1934 continue;
1935 }
1936 dev_ibmtr[i] = dev;
1937 count++;
1938 }
1939 if (count) return 0;
1940 printk("ibmtr: register_netdev() returned non-zero.\n");
1941 return -EIO;
1942 }
1943 module_init(ibmtr_init);
1944
1945 static void __exit ibmtr_cleanup(void)
1946 {
1947 int i;
1948
1949 for (i = 0; i < IBMTR_MAX_ADAPTERS; i++){
1950 if (!dev_ibmtr[i])
1951 continue;
1952 unregister_netdev(dev_ibmtr[i]);
1953 ibmtr_cleanup_card(dev_ibmtr[i]);
1954 free_netdev(dev_ibmtr[i]);
1955 }
1956 }
1957 module_exit(ibmtr_cleanup);
1958 #endif
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