Merge branch 'master'
[linux-3.10.git] / drivers / net / tokenring / ibmtr.c
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
112 #ifdef PCMCIA           /* required for ibmtr_cs.c to build */
113 #undef MODULE           /* yes, really */
114 #undef ENABLE_PAGING
115 #else
116 #define ENABLE_PAGING 1         
117 #endif
118
119 #define FALSE 0
120 #define TRUE (!FALSE)
121
122 /* changes the output format of driver initialization */
123 #define TR_VERBOSE      0
124
125 /* some 95 OS send many non UI frame; this allow removing the warning */
126 #define TR_FILTERNONUI  1
127
128 #include <linux/ioport.h>
129 #include <linux/netdevice.h>
130 #include <linux/ip.h>
131 #include <linux/trdevice.h>
132 #include <linux/ibmtr.h>
133
134 #include <net/checksum.h>
135
136 #include <asm/io.h>
137
138 #define DPRINTK(format, args...) printk("%s: " format, dev->name , ## args)
139 #define DPRINTD(format, args...) DummyCall("%s: " format, dev->name , ## args)
140
141 /* version and credits */
142 #ifndef PCMCIA
143 static char version[] __initdata =
144     "\nibmtr.c: v1.3.57   8/ 7/94 Peter De Schrijver and Mark Swanson\n"
145     "         v2.1.125 10/20/98 Paul Norton    <pnorton@ieee.org>\n"
146     "         v2.2.0   12/30/98 Joel Sloan     <jjs@c-me.com>\n"
147     "         v2.2.1   02/08/00 Mike Sullivan  <sullivam@us.ibm.com>\n" 
148     "         v2.2.2   07/27/00 Burt Silverman <burts@us.ibm.com>\n" 
149     "         v2.4.0   03/01/01 Mike Sullivan <sullivan@us.ibm.com>\n";
150 #endif
151
152 /* this allows displaying full adapter information */
153
154 static char *channel_def[] __devinitdata = { "ISA", "MCA", "ISA P&P" };
155
156 static char pcchannelid[] __devinitdata = {
157         0x05, 0x00, 0x04, 0x09,
158         0x04, 0x03, 0x04, 0x0f,
159         0x03, 0x06, 0x03, 0x01,
160         0x03, 0x01, 0x03, 0x00,
161         0x03, 0x09, 0x03, 0x09,
162         0x03, 0x00, 0x02, 0x00
163 };
164
165 static char mcchannelid[] __devinitdata =  {
166         0x04, 0x0d, 0x04, 0x01,
167         0x05, 0x02, 0x05, 0x03,
168         0x03, 0x06, 0x03, 0x03,
169         0x05, 0x08, 0x03, 0x04,
170         0x03, 0x05, 0x03, 0x01,
171         0x03, 0x08, 0x02, 0x00
172 };
173
174 static char __devinit *adapter_def(char type)
175 {
176         switch (type) {
177         case 0xF: return "PC Adapter | PC Adapter II | Adapter/A";
178         case 0xE: return "16/4 Adapter | 16/4 Adapter/A (long)";
179         case 0xD: return "16/4 Adapter/A (short) | 16/4 ISA-16 Adapter";
180         case 0xC: return "Auto 16/4 Adapter";
181         default: return "adapter (unknown type)";
182         };
183 };
184
185 #define TRC_INIT 0x01           /*  Trace initialization & PROBEs */
186 #define TRC_INITV 0x02          /*  verbose init trace points     */
187 static unsigned char ibmtr_debug_trace = 0;
188
189 static int      ibmtr_probe(struct net_device *dev);
190 static int      ibmtr_probe1(struct net_device *dev, int ioaddr);
191 static unsigned char get_sram_size(struct tok_info *adapt_info);
192 static int      trdev_init(struct net_device *dev);
193 static int      tok_open(struct net_device *dev);
194 static int      tok_init_card(struct net_device *dev);
195 static void     tok_open_adapter(unsigned long dev_addr);
196 static void     open_sap(unsigned char type, struct net_device *dev);
197 static void     tok_set_multicast_list(struct net_device *dev);
198 static int      tok_send_packet(struct sk_buff *skb, struct net_device *dev);
199 static int      tok_close(struct net_device *dev);
200 static irqreturn_t tok_interrupt(int irq, void *dev_id, struct pt_regs *regs);
201 static void     initial_tok_int(struct net_device *dev);
202 static void     tr_tx(struct net_device *dev);
203 static void     tr_rx(struct net_device *dev);
204 static void     ibmtr_reset_timer(struct timer_list*tmr,struct net_device *dev);
205 static void     tok_rerun(unsigned long dev_addr);
206 static void     ibmtr_readlog(struct net_device *dev);
207 static struct   net_device_stats *tok_get_stats(struct net_device *dev);
208 static int      ibmtr_change_mtu(struct net_device *dev, int mtu);
209 static void     find_turbo_adapters(int *iolist);
210
211 static int ibmtr_portlist[IBMTR_MAX_ADAPTERS+1] __devinitdata = {
212         0xa20, 0xa24, 0, 0, 0
213 };
214 static int __devinitdata turbo_io[IBMTR_MAX_ADAPTERS] = {0};
215 static int __devinitdata turbo_irq[IBMTR_MAX_ADAPTERS] = {0};
216 static int __devinitdata turbo_searched = 0;
217
218 #ifndef PCMCIA
219 static __u32 ibmtr_mem_base __initdata = 0xd0000;
220 #endif
221
222 static void __devinit PrtChanID(char *pcid, short stride)
223 {
224         short i, j;
225         for (i = 0, j = 0; i < 24; i++, j += stride)
226                 printk("%1x", ((int) pcid[j]) & 0x0f);
227         printk("\n");
228 }
229
230 static void __devinit HWPrtChanID(void __iomem *pcid, short stride)
231 {
232         short i, j;
233         for (i = 0, j = 0; i < 24; i++, j += stride)
234                 printk("%1x", ((int) readb(pcid + j)) & 0x0f);
235         printk("\n");
236 }
237
238 /* We have to ioremap every checked address, because isa_readb is 
239  * going away. 
240  */
241
242 static void __devinit find_turbo_adapters(int *iolist)
243 {
244         int ram_addr;
245         int index=0;
246         void __iomem *chanid;
247         int found_turbo=0;
248         unsigned char *tchanid, ctemp;
249         int i, j;
250         unsigned long jif;
251         void __iomem *ram_mapped ;   
252
253         if (turbo_searched == 1) return;
254         turbo_searched=1;
255         for (ram_addr=0xC0000; ram_addr < 0xE0000; ram_addr+=0x2000) {
256
257                 __u32 intf_tbl=0;
258
259                 found_turbo=1;
260                 ram_mapped = ioremap((u32)ram_addr,0x1fff) ; 
261                 if (ram_mapped==NULL) 
262                         continue ; 
263                 chanid=(CHANNEL_ID + ram_mapped);
264                 tchanid=pcchannelid;
265                 ctemp=readb(chanid) & 0x0f;
266                 if (ctemp != *tchanid) continue;
267                 for (i=2,j=1; i<=46; i=i+2,j++) {
268                         if ((readb(chanid+i) & 0x0f) != tchanid[j]){
269                                 found_turbo=0;
270                                 break;
271                         }
272                 }
273                 if (!found_turbo) continue;
274
275                 writeb(0x90, ram_mapped+0x1E01);
276                 for(i=2; i<0x0f; i++) {
277                         writeb(0x00, ram_mapped+0x1E01+i);
278                 }
279                 writeb(0x00, ram_mapped+0x1E01);
280                 for(jif=jiffies+TR_BUSY_INTERVAL; time_before_eq(jiffies,jif););
281                 intf_tbl=ntohs(readw(ram_mapped+ACA_OFFSET+ACA_RW+WRBR_EVEN));
282                 if (intf_tbl) {
283 #if IBMTR_DEBUG_MESSAGES
284                         printk("ibmtr::find_turbo_adapters, Turbo found at "
285                                 "ram_addr %x\n",ram_addr);
286                         printk("ibmtr::find_turbo_adapters, interface_table ");
287                         for(i=0; i<6; i++) {
288                                 printk("%x:",readb(ram_addr+intf_tbl+i));
289                         }
290                         printk("\n");
291 #endif
292                         turbo_io[index]=ntohs(readw(ram_mapped+intf_tbl+4));
293                         turbo_irq[index]=readb(ram_mapped+intf_tbl+3);
294                         outb(0, turbo_io[index] + ADAPTRESET);
295                         for(jif=jiffies+TR_RST_TIME;time_before_eq(jiffies,jif););
296                         outb(0, turbo_io[index] + ADAPTRESETREL);
297                         index++;
298                         continue;
299                 }
300 #if IBMTR_DEBUG_MESSAGES 
301                 printk("ibmtr::find_turbo_adapters, ibmtr card found at"
302                         " %x but not a Turbo model\n",ram_addr);
303 #endif
304         iounmap(ram_mapped) ;   
305         } /* for */
306         for(i=0; i<IBMTR_MAX_ADAPTERS; i++) {
307                 if(!turbo_io[i]) break;
308                 for (j=0; j<IBMTR_MAX_ADAPTERS; j++) {
309                         if ( iolist[j] && iolist[j] != turbo_io[i]) continue;
310                         iolist[j]=turbo_io[i];
311                         break;
312                 }
313         }
314 }
315
316 static void ibmtr_cleanup_card(struct net_device *dev)
317 {
318         if (dev->base_addr) {
319                 outb(0,dev->base_addr+ADAPTRESET);
320                 
321                 schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
322
323                 outb(0,dev->base_addr+ADAPTRESETREL);
324         }
325
326 #ifndef PCMCIA
327         free_irq(dev->irq, dev);
328         release_region(dev->base_addr, IBMTR_IO_EXTENT);
329
330         { 
331                 struct tok_info *ti = (struct tok_info *) dev->priv;
332                 iounmap(ti->mmio);
333                 iounmap(ti->sram_virt);
334         }
335 #endif          
336 }
337
338 int ibmtr_probe_card(struct net_device *dev)
339 {
340         int err = ibmtr_probe(dev);
341         if (!err) {
342                 err = register_netdev(dev);
343                 if (err)
344                         ibmtr_cleanup_card(dev);
345         }
346         return err;
347 }
348
349 /****************************************************************************
350  *      ibmtr_probe():  Routine specified in the network device structure
351  *      to probe for an IBM Token Ring Adapter.  Routine outline:
352  *      I.    Interrogate hardware to determine if an adapter exists
353  *            and what the speeds and feeds are
354  *      II.   Setup data structures to control execution based upon
355  *            adapter characteristics.
356  *
357  *      We expect ibmtr_probe to be called once for each device entry
358  *      which references it.
359  ****************************************************************************/
360
361 static int ibmtr_probe(struct net_device *dev)
362 {
363         int i;
364         int base_addr = dev->base_addr;
365
366         if (base_addr && base_addr <= 0x1ff) /* Don't probe at all. */
367                 return -ENXIO;
368         if (base_addr > 0x1ff) { /* Check a single specified location.  */
369                 if (!ibmtr_probe1(dev, base_addr)) return 0;
370                 return -ENODEV;
371         }
372         find_turbo_adapters(ibmtr_portlist);
373         for (i = 0; ibmtr_portlist[i]; i++) {
374                 int ioaddr = ibmtr_portlist[i];
375
376                 if (!ibmtr_probe1(dev, ioaddr)) return 0;
377         }
378         return -ENODEV;
379 }
380
381 /*****************************************************************************/
382
383 static int __devinit ibmtr_probe1(struct net_device *dev, int PIOaddr)
384 {
385
386         unsigned char segment, intr=0, irq=0, i, j, cardpresent=NOTOK, temp=0;
387         void __iomem * t_mmio = NULL;
388         struct tok_info *ti = dev->priv;
389         void __iomem *cd_chanid;
390         unsigned char *tchanid, ctemp;
391 #ifndef PCMCIA
392         unsigned char t_irq=0;
393         unsigned long timeout;
394         static int version_printed;
395 #endif
396
397         /*    Query the adapter PIO base port which will return
398          *    indication of where MMIO was placed. We also have a
399          *    coded interrupt number.
400          */
401         segment = inb(PIOaddr);
402         if (segment < 0x40 || segment > 0xe0) {
403                 /* Out of range values so we'll assume non-existent IO device
404                  * but this is not necessarily a problem, esp if a turbo
405                  * adapter is being used.  */
406 #if IBMTR_DEBUG_MESSAGES
407                 DPRINTK("ibmtr_probe1(): unhappy that inb(0x%X) == 0x%X, "
408                         "Hardware Problem?\n",PIOaddr,segment);
409 #endif
410                 return -ENODEV;
411         }
412         /*
413          *    Compute the linear base address of the MMIO area
414          *    as LINUX doesn't care about segments
415          */
416         t_mmio = ioremap(((__u32) (segment & 0xfc) << 11) + 0x80000,2048);
417         if (!t_mmio) { 
418                 DPRINTK("Cannot remap mmiobase memory area") ; 
419                 return -ENODEV ; 
420         } 
421         intr = segment & 0x03;  /* low bits is coded interrupt # */
422         if (ibmtr_debug_trace & TRC_INIT)
423                 DPRINTK("PIOaddr: %4hx seg/intr: %2x mmio base: %p intr: %d\n"
424                                 , PIOaddr, (int) segment, t_mmio, (int) intr);
425
426         /*
427          *    Now we will compare expected 'channelid' strings with
428          *    what we is there to learn of ISA/MCA or not TR card
429          */
430 #ifdef PCMCIA
431         iounmap(t_mmio);
432         t_mmio = ti->mmio;      /*BMS to get virtual address */
433         irq = ti->irq;          /*BMS to display the irq!   */
434 #endif
435         cd_chanid = (CHANNEL_ID + t_mmio);      /* for efficiency */
436         tchanid = pcchannelid;
437         cardpresent = TR_ISA;   /* try ISA */
438
439         /*    Suboptimize knowing first byte different */
440         ctemp = readb(cd_chanid) & 0x0f;
441         if (ctemp != *tchanid) {        /* NOT ISA card, try MCA */
442                 tchanid = mcchannelid;
443                 cardpresent = TR_MCA;
444                 if (ctemp != *tchanid)  /* Neither ISA nor MCA */
445                         cardpresent = NOTOK;
446         }
447         if (cardpresent != NOTOK) {
448                 /*       Know presumed type, try rest of ID */
449                 for (i = 2, j = 1; i <= 46; i = i + 2, j++) {
450                         if( (readb(cd_chanid+i)&0x0f) == tchanid[j]) continue;
451                         /* match failed, not TR card */
452                         cardpresent = NOTOK;
453                         break;
454                 }
455         }
456         /* 
457          *    If we have an ISA board check for the ISA P&P version,
458          *    as it has different IRQ settings 
459          */
460         if (cardpresent == TR_ISA && (readb(AIPFID + t_mmio) == 0x0e))
461                 cardpresent = TR_ISAPNP;
462         if (cardpresent == NOTOK) {     /* "channel_id" did not match, report */
463                 if (!(ibmtr_debug_trace & TRC_INIT)) {
464 #ifndef PCMCIA
465                         iounmap(t_mmio);
466 #endif
467                         return -ENODEV;
468                 }
469                 DPRINTK( "Channel ID string not found for PIOaddr: %4hx\n",
470                                                                 PIOaddr);
471                 DPRINTK("Expected for ISA: ");
472                 PrtChanID(pcchannelid, 1);
473                 DPRINTK("           found: ");
474 /* BMS Note that this can be misleading, when hardware is flaky, because you
475    are reading it a second time here. So with my flaky hardware, I'll see my-
476    self in this block, with the HW ID matching the ISA ID exactly! */
477                 HWPrtChanID(cd_chanid, 2);
478                 DPRINTK("Expected for MCA: ");
479                 PrtChanID(mcchannelid, 1);
480         }
481         /* Now, setup some of the pl0 buffers for this driver.. */
482         /* If called from PCMCIA, it is already set up, so no need to 
483            waste the memory, just use the existing structure */
484 #ifndef PCMCIA
485         ti->mmio = t_mmio;
486         for (i = 0; i < IBMTR_MAX_ADAPTERS; i++) {
487                 if (turbo_io[i] != PIOaddr)
488                         continue;
489 #if IBMTR_DEBUG_MESSAGES 
490                 printk("ibmtr::tr_probe1, setting PIOaddr %x to Turbo\n",
491                        PIOaddr);
492 #endif
493                 ti->turbo = 1;
494                 t_irq = turbo_irq[i];
495         }
496 #endif /* !PCMCIA */
497         ti->readlog_pending = 0;
498         init_waitqueue_head(&ti->wait_for_reset);
499
500         /* if PCMCIA, the card can be recognized as either TR_ISA or TR_ISAPNP
501          * depending which card is inserted.    */
502         
503 #ifndef PCMCIA
504         switch (cardpresent) {
505         case TR_ISA:
506                 if (intr == 0) irq = 9; /* irq2 really is irq9 */
507                 if (intr == 1) irq = 3;
508                 if (intr == 2) irq = 6;
509                 if (intr == 3) irq = 7;
510                 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
511                 break;
512         case TR_MCA:
513                 if (intr == 0) irq = 9;
514                 if (intr == 1) irq = 3;
515                 if (intr == 2) irq = 10;
516                 if (intr == 3) irq = 11;
517                 ti->global_int_enable = 0;
518                 ti->adapter_int_enable = 0;
519                 ti->sram_phys=(__u32)(inb(PIOaddr+ADAPTRESETREL) & 0xfe) << 12;
520                 break;
521         case TR_ISAPNP:
522                 if (!t_irq) {
523                         if (intr == 0) irq = 9;
524                         if (intr == 1) irq = 3;
525                         if (intr == 2) irq = 10;
526                         if (intr == 3) irq = 11;
527                 } else
528                         irq=t_irq;
529                 timeout = jiffies + TR_SPIN_INTERVAL;
530                 while (!readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)){
531                         if (!time_after(jiffies, timeout)) continue;
532                         DPRINTK( "Hardware timeout during initialization.\n");
533                         iounmap(t_mmio);
534                         return -ENODEV;
535                 }
536                 ti->sram_phys =
537                      ((__u32)readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_EVEN)<<12);
538                 ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
539                 break;
540         } /*end switch (cardpresent) */
541 #endif  /*not PCMCIA */
542
543         if (ibmtr_debug_trace & TRC_INIT) {     /* just report int */
544                 DPRINTK("irq=%d", irq);
545                 printk(", sram_phys=0x%x", ti->sram_phys);
546                 if(ibmtr_debug_trace&TRC_INITV){ /* full chat in verbose only */
547                         DPRINTK(", ti->mmio=%p", ti->mmio);
548                         printk(", segment=%02X", segment);
549                 }
550                 printk(".\n");
551         }
552
553         /* Get hw address of token ring card */
554         j = 0;
555         for (i = 0; i < 0x18; i = i + 2) {
556                 /* technical reference states to do this */
557                 temp = readb(ti->mmio + AIP + i) & 0x0f;
558                 ti->hw_address[j] = temp;
559                 if (j & 1)
560                         dev->dev_addr[(j / 2)] =
561                                 ti->hw_address[j]+ (ti->hw_address[j - 1] << 4);
562                 ++j;
563         }
564         /* get Adapter type:  'F' = Adapter/A, 'E' = 16/4 Adapter II,... */
565         ti->adapter_type = readb(ti->mmio + AIPADAPTYPE);
566
567         /* get Data Rate:  F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */
568         ti->data_rate = readb(ti->mmio + AIPDATARATE);
569
570         /* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */
571         ti->token_release = readb(ti->mmio + AIPEARLYTOKEN);
572
573         /* How much shared RAM is on adapter ? */
574         if (ti->turbo) {
575                 ti->avail_shared_ram=127;
576         } else {
577                 ti->avail_shared_ram = get_sram_size(ti);/*in 512 byte units */
578         }
579         /* We need to set or do a bunch of work here based on previous results*/
580         /* Support paging?  What sizes?:  F=no, E=16k, D=32k, C=16 & 32k */
581         ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE);
582
583         /* Available DHB  4Mb size:   F=2048, E=4096, D=4464 */
584         switch (readb(ti->mmio + AIP4MBDHB)) {
585         case 0xe: ti->dhb_size4mb = 4096; break;
586         case 0xd: ti->dhb_size4mb = 4464; break;
587         default:  ti->dhb_size4mb = 2048; break;
588         }
589
590         /* Available DHB 16Mb size:  F=2048, E=4096, D=8192, C=16384, B=17960 */
591         switch (readb(ti->mmio + AIP16MBDHB)) {
592         case 0xe: ti->dhb_size16mb = 4096; break;
593         case 0xd: ti->dhb_size16mb = 8192; break;
594         case 0xc: ti->dhb_size16mb = 16384; break;
595         case 0xb: ti->dhb_size16mb = 17960; break;
596         default:  ti->dhb_size16mb = 2048; break;
597         }
598
599         /*    We must figure out how much shared memory space this adapter
600          *    will occupy so that if there are two adapters we can fit both
601          *    in.  Given a choice, we will limit this adapter to 32K.  The
602          *    maximum space will will use for two adapters is 64K so if the
603          *    adapter we are working on demands 64K (it also doesn't support
604          *    paging), then only one adapter can be supported.  
605          */
606
607         /*
608          *    determine how much of total RAM is mapped into PC space 
609          */
610         ti->mapped_ram_size= /*sixteen to onehundredtwentyeight 512byte blocks*/
611             1<< ((readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03) + 4);
612         ti->page_mask = 0;
613         if (ti->turbo)  ti->page_mask=0xf0;
614         else if (ti->shared_ram_paging == 0xf);  /* No paging in adapter */
615         else {
616 #ifdef ENABLE_PAGING
617                 unsigned char pg_size = 0;
618                 /* BMS:   page size: PCMCIA, use configuration register;
619                    ISAPNP, use LANAIDC config tool from www.ibm.com  */
620                 switch (ti->shared_ram_paging) {
621                 case 0xf:
622                         break;
623                 case 0xe:
624                         ti->page_mask = (ti->mapped_ram_size == 32) ? 0xc0 : 0;
625                         pg_size = 32;   /* 16KB page size */
626                         break;
627                 case 0xd:
628                         ti->page_mask = (ti->mapped_ram_size == 64) ? 0x80 : 0;
629                         pg_size = 64;   /* 32KB page size */
630                         break;
631                 case 0xc:
632                         switch (ti->mapped_ram_size) {
633                         case 32:
634                                 ti->page_mask = 0xc0;
635                                 pg_size = 32;
636                                 break;
637                         case 64:
638                                 ti->page_mask = 0x80;
639                                 pg_size = 64;
640                                 break;
641                         }
642                         break;
643                 default:
644                         DPRINTK("Unknown shared ram paging info %01X\n",
645                                                         ti->shared_ram_paging);
646                         iounmap(t_mmio); 
647                         return -ENODEV;
648                         break;
649                 } /*end switch shared_ram_paging */
650
651                 if (ibmtr_debug_trace & TRC_INIT)
652                         DPRINTK("Shared RAM paging code: %02X, "
653                                 "mapped RAM size: %dK, shared RAM size: %dK, "
654                                 "page mask: %02X\n:",
655                                 ti->shared_ram_paging, ti->mapped_ram_size / 2,
656                                 ti->avail_shared_ram / 2, ti->page_mask);
657 #endif  /*ENABLE_PAGING */
658         }
659
660 #ifndef PCMCIA
661         /* finish figuring the shared RAM address */
662         if (cardpresent == TR_ISA) {
663                 static __u32 ram_bndry_mask[] =
664                         { 0xffffe000, 0xffffc000, 0xffff8000, 0xffff0000 };
665                 __u32 new_base, rrr_32, chk_base, rbm;
666
667                 rrr_32=readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03;
668                 rbm = ram_bndry_mask[rrr_32];
669                 new_base = (ibmtr_mem_base + (~rbm)) & rbm;/* up to boundary */
670                 chk_base = new_base + (ti->mapped_ram_size << 9);
671                 if (chk_base > (ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE)) {
672                         DPRINTK("Shared RAM for this adapter (%05x) exceeds "
673                         "driver limit (%05x), adapter not started.\n",
674                         chk_base, ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE);
675                         iounmap(t_mmio);
676                         return -ENODEV;
677                 } else { /* seems cool, record what we have figured out */
678                         ti->sram_base = new_base >> 12;
679                         ibmtr_mem_base = chk_base;
680                 }
681         }
682         else  ti->sram_base = ti->sram_phys >> 12;
683
684         /* The PCMCIA has already got the interrupt line and the io port, 
685            so no chance of anybody else getting it - MLP */
686         if (request_irq(dev->irq = irq, &tok_interrupt, 0, "ibmtr", dev) != 0) {
687                 DPRINTK("Could not grab irq %d.  Halting Token Ring driver.\n",
688                                         irq);
689                 iounmap(t_mmio);
690                 return -ENODEV;
691         }
692         /*?? Now, allocate some of the PIO PORTs for this driver.. */
693         /* record PIOaddr range as busy */
694         if (!request_region(PIOaddr, IBMTR_IO_EXTENT, "ibmtr")) {
695                 DPRINTK("Could not grab PIO range. Halting driver.\n");
696                 free_irq(dev->irq, dev);
697                 iounmap(t_mmio);
698                 return -EBUSY;
699         }
700
701         if (!version_printed++) {
702                 printk(version);
703         }
704 #endif /* !PCMCIA */
705         DPRINTK("%s %s found\n",
706                 channel_def[cardpresent - 1], adapter_def(ti->adapter_type));
707         DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n",
708                         irq, PIOaddr, ti->mapped_ram_size / 2);
709         DPRINTK("Hardware address : %02X:%02X:%02X:%02X:%02X:%02X\n",
710                 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
711                 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
712         if (ti->page_mask)
713                 DPRINTK("Shared RAM paging enabled. "
714                         "Page size: %uK Shared Ram size %dK\n",
715                         ((ti->page_mask^0xff)+1) >>2, ti->avail_shared_ram / 2);
716         else
717                 DPRINTK("Shared RAM paging disabled. ti->page_mask %x\n",
718                                                                 ti->page_mask);
719
720         /* Calculate the maximum DHB we can use */
721         /* two cases where avail_shared_ram doesn't equal mapped_ram_size:
722             1. avail_shared_ram is 127 but mapped_ram_size is 128 (typical)
723             2. user has configured adapter for less than avail_shared_ram
724                but is not using paging (she should use paging, I believe)
725         */
726         if (!ti->page_mask) {
727                 ti->avail_shared_ram=
728                                 min(ti->mapped_ram_size,ti->avail_shared_ram);
729         }
730
731         switch (ti->avail_shared_ram) {
732         case 16:                /* 8KB shared RAM */
733                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)2048);
734                 ti->rbuf_len4 = 1032;
735                 ti->rbuf_cnt4=2;
736                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)2048);
737                 ti->rbuf_len16 = 1032;
738                 ti->rbuf_cnt16=2;
739                 break;
740         case 32:                /* 16KB shared RAM */
741                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
742                 ti->rbuf_len4 = 1032;
743                 ti->rbuf_cnt4=4;
744                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)4096);
745                 ti->rbuf_len16 = 1032;  /*1024 usable */
746                 ti->rbuf_cnt16=4;
747                 break;
748         case 64:                /* 32KB shared RAM */
749                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
750                 ti->rbuf_len4 = 1032;
751                 ti->rbuf_cnt4=6;
752                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)10240);
753                 ti->rbuf_len16 = 1032;
754                 ti->rbuf_cnt16=6;
755                 break;
756         case 127:               /* 63.5KB shared RAM */
757                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
758                 ti->rbuf_len4 = 1032;
759                 ti->rbuf_cnt4=6;
760                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)16384);
761                 ti->rbuf_len16 = 1032;
762                 ti->rbuf_cnt16=16;
763                 break;
764         case 128:               /* 64KB   shared RAM */
765                 ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
766                 ti->rbuf_len4 = 1032;
767                 ti->rbuf_cnt4=6;
768                 ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)17960);
769                 ti->rbuf_len16 = 1032;
770                 ti->rbuf_cnt16=16;
771                 break;
772         default:
773                 ti->dhb_size4mb = 2048;
774                 ti->rbuf_len4 = 1032;
775                 ti->rbuf_cnt4=2;
776                 ti->dhb_size16mb = 2048;
777                 ti->rbuf_len16 = 1032;
778                 ti->rbuf_cnt16=2;
779                 break;
780         }
781         /* this formula is not smart enough for the paging case
782         ti->rbuf_cnt<x> = (ti->avail_shared_ram * BLOCKSZ - ADAPT_PRIVATE -
783                         ARBLENGTH - SSBLENGTH - DLC_MAX_SAP * SAPLENGTH -
784                         DLC_MAX_STA * STALENGTH - ti->dhb_size<x>mb * NUM_DHB -
785                         SRBLENGTH - ASBLENGTH) / ti->rbuf_len<x>;
786         */
787         ti->maxmtu16 = (ti->rbuf_len16 - 8) * ti->rbuf_cnt16  - TR_HLEN;
788         ti->maxmtu4 = (ti->rbuf_len4 - 8) * ti->rbuf_cnt4 - TR_HLEN;
789         /*BMS assuming 18 bytes of Routing Information (usually works) */
790         DPRINTK("Maximum Receive Internet Protocol MTU 16Mbps: %d, 4Mbps: %d\n",
791                                                      ti->maxmtu16, ti->maxmtu4);
792
793         dev->base_addr = PIOaddr;       /* set the value for device */
794         dev->mem_start = ti->sram_base << 12;
795         dev->mem_end = dev->mem_start + (ti->mapped_ram_size << 9) - 1;
796         trdev_init(dev);
797         return 0;   /* Return 0 to indicate we have found a Token Ring card. */
798 }                               /*ibmtr_probe1() */
799
800 /*****************************************************************************/
801
802 /* query the adapter for the size of shared RAM  */
803 /* the function returns the RAM size in units of 512 bytes */
804
805 static unsigned char __devinit get_sram_size(struct tok_info *adapt_info)
806 {
807         unsigned char avail_sram_code;
808         static unsigned char size_code[] = { 0, 16, 32, 64, 127, 128 };
809         /* Adapter gives
810            'F' -- use RRR bits 3,2
811            'E' -- 8kb   'D' -- 16kb
812            'C' -- 32kb  'A' -- 64KB
813            'B' - 64KB less 512 bytes at top
814            (WARNING ... must zero top bytes in INIT */
815
816         avail_sram_code = 0xf - readb(adapt_info->mmio + AIPAVAILSHRAM);
817         if (avail_sram_code) return size_code[avail_sram_code];
818         else            /* for code 'F', must compute size from RRR(3,2) bits */
819                 return 1 <<
820                  ((readb(adapt_info->mmio+ACA_OFFSET+ACA_RW+RRR_ODD)>>2&3)+4);
821 }
822
823 /*****************************************************************************/
824
825 static int __devinit trdev_init(struct net_device *dev)
826 {
827         struct tok_info *ti = (struct tok_info *) dev->priv;
828
829         SET_PAGE(ti->srb_page);
830         ti->open_failure = NO    ;
831         dev->open = tok_open;
832         dev->stop = tok_close;
833         dev->hard_start_xmit = tok_send_packet;
834         dev->get_stats = tok_get_stats;
835         dev->set_multicast_list = tok_set_multicast_list;
836         dev->change_mtu = ibmtr_change_mtu;
837
838         return 0;
839 }
840
841 /*****************************************************************************/
842
843 static int tok_init_card(struct net_device *dev)
844 {
845         struct tok_info *ti;
846         short PIOaddr;
847         unsigned long i;
848
849         PIOaddr = dev->base_addr;
850         ti = (struct tok_info *) dev->priv;
851         /* Special processing for first interrupt after reset */
852         ti->do_tok_int = FIRST_INT;
853         /* Reset adapter */
854         writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
855         outb(0, PIOaddr + ADAPTRESET);
856
857         schedule_timeout_uninterruptible(TR_RST_TIME); /* wait 50ms */
858
859         outb(0, PIOaddr + ADAPTRESETREL);
860 #ifdef ENABLE_PAGING
861         if (ti->page_mask)
862                 writeb(SRPR_ENABLE_PAGING,ti->mmio+ACA_OFFSET+ACA_RW+SRPR_EVEN);
863 #endif
864         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
865         i = sleep_on_timeout(&ti->wait_for_reset, 4 * HZ);
866         return i? 0 : -EAGAIN;
867 }
868
869 /*****************************************************************************/
870 static int tok_open(struct net_device *dev)
871 {
872         struct tok_info *ti = (struct tok_info *) dev->priv;
873         int i;
874
875         /*the case we were left in a failure state during a previous open */
876         if (ti->open_failure == YES) {
877                 DPRINTK("Last time you were disconnected, how about now?\n");
878                 printk("You can't insert with an ICS connector half-cocked.\n");
879         }
880
881         ti->open_status  = CLOSED; /* CLOSED or OPEN      */
882         ti->sap_status   = CLOSED; /* CLOSED or OPEN      */
883         ti->open_failure =     NO; /* NO     or YES       */
884         ti->open_mode    = MANUAL; /* MANUAL or AUTOMATIC */
885
886         ti->sram_phys &= ~1; /* to reverse what we do in tok_close */
887         /* init the spinlock */
888         spin_lock_init(&ti->lock);
889         init_timer(&ti->tr_timer);
890         
891         i = tok_init_card(dev);
892         if (i) return i;
893
894         while (1){
895                 tok_open_adapter((unsigned long) dev);
896                 i= interruptible_sleep_on_timeout(&ti->wait_for_reset, 25 * HZ);
897                 /* sig catch: estimate opening adapter takes more than .5 sec*/
898                 if (i>(245*HZ)/10) break; /* fancier than if (i==25*HZ) */
899                 if (i==0) break;
900                 if (ti->open_status == OPEN && ti->sap_status==OPEN) {
901                         netif_start_queue(dev);
902                         DPRINTK("Adapter is up and running\n");
903                         return 0;
904                 }
905                 i=schedule_timeout_interruptible(TR_RETRY_INTERVAL);
906                                                         /* wait 30 seconds */
907                 if(i!=0) break; /*prob. a signal, like the i>24*HZ case above */
908         }
909         outb(0, dev->base_addr + ADAPTRESET);/* kill pending interrupts*/
910         DPRINTK("TERMINATED via signal\n");     /*BMS useful */
911         return -EAGAIN;
912 }
913
914 /*****************************************************************************/
915
916 #define COMMAND_OFST             0
917 #define OPEN_OPTIONS_OFST        8
918 #define NUM_RCV_BUF_OFST        24
919 #define RCV_BUF_LEN_OFST        26
920 #define DHB_LENGTH_OFST         28
921 #define NUM_DHB_OFST            30
922 #define DLC_MAX_SAP_OFST        32
923 #define DLC_MAX_STA_OFST        33
924
925 static void tok_open_adapter(unsigned long dev_addr)
926 {
927         struct net_device *dev = (struct net_device *) dev_addr;
928         struct tok_info *ti;
929         int i;
930
931         ti = (struct tok_info *) dev->priv;
932         SET_PAGE(ti->init_srb_page); 
933         writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD);
934         for (i = 0; i < sizeof(struct dir_open_adapter); i++)
935                 writeb(0, ti->init_srb + i);
936         writeb(DIR_OPEN_ADAPTER, ti->init_srb + COMMAND_OFST);
937         writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + OPEN_OPTIONS_OFST);
938         if (ti->ring_speed == 16) {
939                 writew(htons(ti->dhb_size16mb), ti->init_srb + DHB_LENGTH_OFST);
940                 writew(htons(ti->rbuf_cnt16), ti->init_srb + NUM_RCV_BUF_OFST);
941                 writew(htons(ti->rbuf_len16), ti->init_srb + RCV_BUF_LEN_OFST);
942         } else {
943                 writew(htons(ti->dhb_size4mb), ti->init_srb + DHB_LENGTH_OFST);
944                 writew(htons(ti->rbuf_cnt4), ti->init_srb + NUM_RCV_BUF_OFST);
945                 writew(htons(ti->rbuf_len4), ti->init_srb + RCV_BUF_LEN_OFST);
946         }
947         writeb(NUM_DHB,         /* always 2 */ ti->init_srb + NUM_DHB_OFST);
948         writeb(DLC_MAX_SAP, ti->init_srb + DLC_MAX_SAP_OFST);
949         writeb(DLC_MAX_STA, ti->init_srb + DLC_MAX_STA_OFST);
950         ti->srb = ti->init_srb; /* We use this one in the interrupt handler */
951         ti->srb_page = ti->init_srb_page;
952         DPRINTK("Opening adapter: Xmit bfrs: %d X %d, Rcv bfrs: %d X %d\n",
953                 readb(ti->init_srb + NUM_DHB_OFST),
954                 ntohs(readw(ti->init_srb + DHB_LENGTH_OFST)),
955                 ntohs(readw(ti->init_srb + NUM_RCV_BUF_OFST)),
956                 ntohs(readw(ti->init_srb + RCV_BUF_LEN_OFST)));
957         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
958         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
959 }
960
961 /*****************************************************************************/
962
963 static void open_sap(unsigned char type, struct net_device *dev)
964 {
965         int i;
966         struct tok_info *ti = (struct tok_info *) dev->priv;
967
968         SET_PAGE(ti->srb_page);
969         for (i = 0; i < sizeof(struct dlc_open_sap); i++)
970                 writeb(0, ti->srb + i);
971
972 #define MAX_I_FIELD_OFST        14
973 #define SAP_VALUE_OFST          16
974 #define SAP_OPTIONS_OFST        17
975 #define STATION_COUNT_OFST      18
976
977         writeb(DLC_OPEN_SAP, ti->srb + COMMAND_OFST);
978         writew(htons(MAX_I_FIELD), ti->srb + MAX_I_FIELD_OFST);
979         writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb+ SAP_OPTIONS_OFST);
980         writeb(SAP_OPEN_STATION_CNT, ti->srb + STATION_COUNT_OFST);
981         writeb(type, ti->srb + SAP_VALUE_OFST);
982         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
983 }
984
985
986 /*****************************************************************************/
987
988 static void tok_set_multicast_list(struct net_device *dev)
989 {
990         struct tok_info *ti = (struct tok_info *) dev->priv;
991         struct dev_mc_list *mclist;
992         unsigned char address[4];
993
994         int i;
995
996         /*BMS the next line is CRUCIAL or you may be sad when you */
997         /*BMS ifconfig tr down or hot unplug a PCMCIA card ??hownowbrowncow*/
998         if (/*BMSHELPdev->start == 0 ||*/ ti->open_status != OPEN) return;
999         address[0] = address[1] = address[2] = address[3] = 0;
1000         mclist = dev->mc_list;
1001         for (i = 0; i < dev->mc_count; i++) {
1002                 address[0] |= mclist->dmi_addr[2];
1003                 address[1] |= mclist->dmi_addr[3];
1004                 address[2] |= mclist->dmi_addr[4];
1005                 address[3] |= mclist->dmi_addr[5];
1006                 mclist = mclist->next;
1007         }
1008         SET_PAGE(ti->srb_page);
1009         for (i = 0; i < sizeof(struct srb_set_funct_addr); i++)
1010                 writeb(0, ti->srb + i);
1011
1012 #define FUNCT_ADDRESS_OFST 6
1013
1014         writeb(DIR_SET_FUNC_ADDR, ti->srb + COMMAND_OFST);
1015         for (i = 0; i < 4; i++) 
1016                 writeb(address[i], ti->srb + FUNCT_ADDRESS_OFST + i);
1017         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1018 #if TR_VERBOSE
1019         DPRINTK("Setting functional address: ");
1020         for (i=0;i<4;i++)  printk("%02X ", address[i]);
1021         printk("\n");
1022 #endif
1023 }
1024
1025 /*****************************************************************************/
1026
1027 #define STATION_ID_OFST 4
1028
1029 static int tok_send_packet(struct sk_buff *skb, struct net_device *dev)
1030 {
1031         struct tok_info *ti;
1032         unsigned long flags;
1033         ti = (struct tok_info *) dev->priv;
1034
1035         netif_stop_queue(dev);
1036
1037         /* lock against other CPUs */
1038         spin_lock_irqsave(&(ti->lock), flags);
1039
1040         /* Save skb; we'll need it when the adapter asks for the data */
1041         ti->current_skb = skb;
1042         SET_PAGE(ti->srb_page);
1043         writeb(XMIT_UI_FRAME, ti->srb + COMMAND_OFST);
1044         writew(ti->exsap_station_id, ti->srb + STATION_ID_OFST);
1045         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1046         spin_unlock_irqrestore(&(ti->lock), flags);
1047         dev->trans_start = jiffies;
1048         return 0;
1049 }
1050
1051 /*****************************************************************************/
1052
1053 static int tok_close(struct net_device *dev)
1054 {
1055         struct tok_info *ti = (struct tok_info *) dev->priv;
1056
1057         /* Important for PCMCIA hot unplug, otherwise, we'll pull the card, */
1058         /* unloading the module from memory, and then if a timer pops, ouch */
1059         del_timer_sync(&ti->tr_timer);
1060         outb(0, dev->base_addr + ADAPTRESET);
1061         ti->sram_phys |= 1;
1062         ti->open_status = CLOSED;
1063
1064         netif_stop_queue(dev);
1065         DPRINTK("Adapter is closed.\n");
1066         return 0;
1067 }
1068
1069 /*****************************************************************************/
1070
1071 #define RETCODE_OFST            2
1072 #define OPEN_ERROR_CODE_OFST    6
1073 #define ASB_ADDRESS_OFST        8
1074 #define SRB_ADDRESS_OFST        10
1075 #define ARB_ADDRESS_OFST        12
1076 #define SSB_ADDRESS_OFST        14
1077
1078 static char *printphase[]= {"Lobe media test","Physical insertion",
1079               "Address verification","Roll call poll","Request Parameters"};
1080 static char *printerror[]={"Function failure","Signal loss","Reserved",
1081                 "Frequency error","Timeout","Ring failure","Ring beaconing",
1082                 "Duplicate node address",
1083                 "Parameter request-retry count exceeded","Remove received",
1084                 "IMPL force received","Duplicate modifier",
1085                 "No monitor detected","Monitor contention failed for RPL"};
1086
1087 static void __iomem *map_address(struct tok_info *ti, unsigned index, __u8 *page)
1088 {
1089         if (ti->page_mask) {
1090                 *page = (index >> 8) & ti->page_mask;
1091                 index &= ~(ti->page_mask << 8);
1092         }
1093         return ti->sram_virt + index;
1094 }
1095
1096 static void dir_open_adapter (struct net_device *dev)
1097 {
1098         struct tok_info *ti = (struct tok_info *) dev->priv;
1099         unsigned char ret_code;
1100         __u16 err;
1101
1102         ti->srb = map_address(ti,
1103                 ntohs(readw(ti->init_srb + SRB_ADDRESS_OFST)),
1104                 &ti->srb_page);
1105         ti->ssb = map_address(ti,
1106                 ntohs(readw(ti->init_srb + SSB_ADDRESS_OFST)),
1107                 &ti->ssb_page);
1108         ti->arb = map_address(ti,
1109                 ntohs(readw(ti->init_srb + ARB_ADDRESS_OFST)),
1110                 &ti->arb_page);
1111         ti->asb = map_address(ti,
1112                 ntohs(readw(ti->init_srb + ASB_ADDRESS_OFST)),
1113                 &ti->asb_page);
1114         ti->current_skb = NULL;
1115         ret_code = readb(ti->init_srb + RETCODE_OFST);
1116         err = ntohs(readw(ti->init_srb + OPEN_ERROR_CODE_OFST));
1117         if (!ret_code) {
1118                 ti->open_status = OPEN; /* TR adapter is now available */
1119                 if (ti->open_mode == AUTOMATIC) {
1120                         DPRINTK("Adapter reopened.\n");
1121                 }
1122                 writeb(~SRB_RESP_INT, ti->mmio+ACA_OFFSET+ACA_RESET+ISRP_ODD);
1123                 open_sap(EXTENDED_SAP, dev);
1124                 return;
1125         }
1126         ti->open_failure = YES;
1127         if (ret_code == 7){
1128                if (err == 0x24) {
1129                         if (!ti->auto_speedsave) {
1130                                 DPRINTK("Open failed: Adapter speed must match "
1131                                  "ring speed if Automatic Ring Speed Save is "
1132                                  "disabled.\n");
1133                                 ti->open_action = FAIL;
1134                         }else
1135                                 DPRINTK("Retrying open to adjust to "
1136                                         "ring speed, ");
1137                 } else if (err == 0x2d) {
1138                         DPRINTK("Physical Insertion: No Monitor Detected, ");
1139                         printk("retrying after %ds delay...\n",
1140                                         TR_RETRY_INTERVAL/HZ);
1141                 } else if (err == 0x11) {
1142                         DPRINTK("Lobe Media Function Failure (0x11), ");
1143                         printk(" retrying after %ds delay...\n",
1144                                         TR_RETRY_INTERVAL/HZ);
1145                 } else {
1146                         char **prphase = printphase;
1147                         char **prerror = printerror;
1148                         DPRINTK("TR Adapter misc open failure, error code = ");
1149                         printk("0x%x, Phase: %s, Error: %s\n",
1150                                 err, prphase[err/16 -1], prerror[err%16 -1]);
1151                         printk(" retrying after %ds delay...\n",
1152                                         TR_RETRY_INTERVAL/HZ);
1153                 }
1154         } else DPRINTK("open failed: ret_code = %02X..., ", ret_code);
1155         if (ti->open_action != FAIL) {
1156                 if (ti->open_mode==AUTOMATIC){
1157                         ti->open_action = REOPEN;
1158                         ibmtr_reset_timer(&(ti->tr_timer), dev);
1159                         return;
1160                 }
1161                 wake_up(&ti->wait_for_reset);
1162                 return;
1163         }
1164         DPRINTK("FAILURE, CAPUT\n");
1165 }
1166
1167 /******************************************************************************/
1168
1169 static irqreturn_t tok_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1170 {
1171         unsigned char status;
1172         /*  unsigned char status_even ; */
1173         struct tok_info *ti;
1174         struct net_device *dev;
1175 #ifdef ENABLE_PAGING
1176         unsigned char save_srpr;
1177 #endif
1178
1179         dev = dev_id;
1180 #if TR_VERBOSE
1181         DPRINTK("Int from tok_driver, dev : %p irq%d regs=%p\n", dev,irq,regs);
1182 #endif
1183         ti = (struct tok_info *) dev->priv;
1184         if (ti->sram_phys & 1)
1185                 return IRQ_NONE;         /* PCMCIA card extraction flag */
1186         spin_lock(&(ti->lock));
1187 #ifdef ENABLE_PAGING
1188         save_srpr = readb(ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1189 #endif
1190
1191         /* Disable interrupts till processing is finished */
1192         writeb((~INT_ENABLE), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1193
1194         /* Reset interrupt for ISA boards */
1195         if (ti->adapter_int_enable)
1196                 outb(0, ti->adapter_int_enable);
1197         else /* used for PCMCIA cards */
1198                 outb(0, ti->global_int_enable);
1199         if (ti->do_tok_int == FIRST_INT){
1200                 initial_tok_int(dev);
1201 #ifdef ENABLE_PAGING
1202                 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1203 #endif
1204                 spin_unlock(&(ti->lock));
1205                 return IRQ_HANDLED;
1206         }
1207         /*  Begin interrupt handler HERE inline to avoid the extra
1208             levels of logic and call depth for the original solution. */
1209         status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_ODD);
1210         /*BMSstatus_even = readb (ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) */
1211         /*BMSdebugprintk("tok_interrupt: ISRP_ODD = 0x%x ISRP_EVEN = 0x%x\n", */
1212         /*BMS                                       status,status_even);      */
1213
1214         if (status & ADAP_CHK_INT) {
1215                 int i;
1216                 void __iomem *check_reason;
1217                 __u8 check_reason_page = 0;
1218                 check_reason = map_address(ti,
1219                         ntohs(readw(ti->mmio+ ACA_OFFSET+ACA_RW + WWCR_EVEN)),
1220                         &check_reason_page);
1221                 SET_PAGE(check_reason_page);
1222
1223                 DPRINTK("Adapter check interrupt\n");
1224                 DPRINTK("8 reason bytes follow: ");
1225                 for (i = 0; i < 8; i++, check_reason++)
1226                         printk("%02X ", (int) readb(check_reason));
1227                 printk("\n");
1228                 writeb(~ADAP_CHK_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1229                 status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRA_EVEN);
1230                 DPRINTK("ISRA_EVEN == 0x02%x\n",status);
1231                 ti->open_status = CLOSED;
1232                 ti->sap_status  = CLOSED;
1233                 ti->open_mode   = AUTOMATIC;
1234                 netif_carrier_off(dev);
1235                 netif_stop_queue(dev);
1236                 ti->open_action = RESTART;
1237                 outb(0, dev->base_addr + ADAPTRESET);
1238                 ibmtr_reset_timer(&(ti->tr_timer), dev);/*BMS try to reopen*/
1239                 spin_unlock(&(ti->lock));
1240                 return IRQ_HANDLED;
1241         }
1242         if (readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN)
1243                 & (TCR_INT | ERR_INT | ACCESS_INT)) {
1244                 DPRINTK("adapter error: ISRP_EVEN : %02x\n",
1245                         (int)readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRP_EVEN));
1246                 writeb(~(TCR_INT | ERR_INT | ACCESS_INT),
1247                         ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
1248                 status= readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRA_EVEN);/*BMS*/
1249                 DPRINTK("ISRA_EVEN == 0x02%x\n",status);/*BMS*/
1250                 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1251 #ifdef ENABLE_PAGING
1252                 writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1253 #endif
1254                 spin_unlock(&(ti->lock));
1255                 return IRQ_HANDLED;
1256         }
1257         if (status & SRB_RESP_INT) {    /* SRB response */
1258                 SET_PAGE(ti->srb_page);
1259 #if TR_VERBOSE
1260                 DPRINTK("SRB resp: cmd=%02X rsp=%02X\n",
1261                                 readb(ti->srb), readb(ti->srb + RETCODE_OFST));
1262 #endif
1263                 switch (readb(ti->srb)) {       /* SRB command check */
1264                 case XMIT_DIR_FRAME:{
1265                         unsigned char xmit_ret_code;
1266                         xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1267                         if (xmit_ret_code == 0xff) break;
1268                         DPRINTK("error on xmit_dir_frame request: %02X\n",
1269                                                                 xmit_ret_code);
1270                         if (ti->current_skb) {
1271                                 dev_kfree_skb_irq(ti->current_skb);
1272                                 ti->current_skb = NULL;
1273                         }
1274                         /*dev->tbusy = 0;*/
1275                         netif_wake_queue(dev);
1276                         if (ti->readlog_pending)
1277                                 ibmtr_readlog(dev);
1278                         break;
1279                 }
1280                 case XMIT_UI_FRAME:{
1281                         unsigned char xmit_ret_code;
1282
1283                         xmit_ret_code = readb(ti->srb + RETCODE_OFST);
1284                         if (xmit_ret_code == 0xff) break;
1285                         DPRINTK("error on xmit_ui_frame request: %02X\n",
1286                                                                 xmit_ret_code);
1287                         if (ti->current_skb) {
1288                                 dev_kfree_skb_irq(ti->current_skb);
1289                                 ti->current_skb = NULL;
1290                         }
1291                         netif_wake_queue(dev);
1292                         if (ti->readlog_pending)
1293                                 ibmtr_readlog(dev);
1294                         break;
1295                 }
1296                 case DIR_OPEN_ADAPTER:
1297                         dir_open_adapter(dev);
1298                         break;
1299                 case DLC_OPEN_SAP:
1300                         if (readb(ti->srb + RETCODE_OFST)) {
1301                                 DPRINTK("open_sap failed: ret_code = %02X, "
1302                                         "retrying\n",
1303                                         (int) readb(ti->srb + RETCODE_OFST));
1304                                 ti->open_action = REOPEN;
1305                                 ibmtr_reset_timer(&(ti->tr_timer), dev);
1306                                 break;
1307                         }
1308                         ti->exsap_station_id = readw(ti->srb + STATION_ID_OFST);
1309                         ti->sap_status = OPEN;/* TR adapter is now available */
1310                         if (ti->open_mode==MANUAL){
1311                                 wake_up(&ti->wait_for_reset);
1312                                 break;
1313                         }
1314                         netif_wake_queue(dev);
1315                         netif_carrier_on(dev);
1316                         break;
1317                 case DIR_INTERRUPT:
1318                 case DIR_MOD_OPEN_PARAMS:
1319                 case DIR_SET_GRP_ADDR:
1320                 case DIR_SET_FUNC_ADDR:
1321                 case DLC_CLOSE_SAP:
1322                         if (readb(ti->srb + RETCODE_OFST))
1323                                 DPRINTK("error on %02X: %02X\n",
1324                                         (int) readb(ti->srb + COMMAND_OFST),
1325                                         (int) readb(ti->srb + RETCODE_OFST));
1326                         break;
1327                 case DIR_READ_LOG:
1328                         if (readb(ti->srb + RETCODE_OFST)){
1329                                 DPRINTK("error on dir_read_log: %02X\n",
1330                                         (int) readb(ti->srb + RETCODE_OFST));
1331                                 netif_wake_queue(dev);
1332                                 break;
1333                         }
1334 #if IBMTR_DEBUG_MESSAGES
1335
1336 #define LINE_ERRORS_OFST                 0
1337 #define INTERNAL_ERRORS_OFST             1
1338 #define BURST_ERRORS_OFST                2
1339 #define AC_ERRORS_OFST                   3
1340 #define ABORT_DELIMITERS_OFST            4
1341 #define LOST_FRAMES_OFST                 6
1342 #define RECV_CONGEST_COUNT_OFST          7
1343 #define FRAME_COPIED_ERRORS_OFST         8
1344 #define FREQUENCY_ERRORS_OFST            9
1345 #define TOKEN_ERRORS_OFST               10
1346
1347                         DPRINTK("Line errors %02X, Internal errors %02X, "
1348                         "Burst errors %02X\n" "A/C errors %02X, "
1349                         "Abort delimiters %02X, Lost frames %02X\n"
1350                         "Receive congestion count %02X, "
1351                         "Frame copied errors %02X\nFrequency errors %02X, "
1352                         "Token errors %02X\n",
1353                         (int) readb(ti->srb + LINE_ERRORS_OFST),
1354                         (int) readb(ti->srb + INTERNAL_ERRORS_OFST),
1355                         (int) readb(ti->srb + BURST_ERRORS_OFST),
1356                         (int) readb(ti->srb + AC_ERRORS_OFST),
1357                         (int) readb(ti->srb + ABORT_DELIMITERS_OFST),
1358                         (int) readb(ti->srb + LOST_FRAMES_OFST),
1359                         (int) readb(ti->srb + RECV_CONGEST_COUNT_OFST),
1360                         (int) readb(ti->srb + FRAME_COPIED_ERRORS_OFST),
1361                         (int) readb(ti->srb + FREQUENCY_ERRORS_OFST),
1362                         (int) readb(ti->srb + TOKEN_ERRORS_OFST));
1363 #endif
1364                         netif_wake_queue(dev);
1365                         break;
1366                 default:
1367                         DPRINTK("Unknown command %02X encountered\n",
1368                                                 (int) readb(ti->srb));
1369                 }       /* end switch SRB command check */
1370                 writeb(~SRB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1371         }       /* if SRB response */
1372         if (status & ASB_FREE_INT) {    /* ASB response */
1373                 SET_PAGE(ti->asb_page);
1374 #if TR_VERBOSE
1375                 DPRINTK("ASB resp: cmd=%02X\n", readb(ti->asb));
1376 #endif
1377
1378                 switch (readb(ti->asb)) {       /* ASB command check */
1379                 case REC_DATA:
1380                 case XMIT_UI_FRAME:
1381                 case XMIT_DIR_FRAME:
1382                         break;
1383                 default:
1384                         DPRINTK("unknown command in asb %02X\n",
1385                                                 (int) readb(ti->asb));
1386                 }       /* switch ASB command check */
1387                 if (readb(ti->asb + 2) != 0xff) /* checks ret_code */
1388                         DPRINTK("ASB error %02X in cmd %02X\n",
1389                                 (int) readb(ti->asb + 2), (int) readb(ti->asb));
1390                 writeb(~ASB_FREE_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1391         }       /* if ASB response */
1392
1393 #define STATUS_OFST             6
1394 #define NETW_STATUS_OFST        6
1395
1396         if (status & ARB_CMD_INT) {     /* ARB response */
1397                 SET_PAGE(ti->arb_page);
1398 #if TR_VERBOSE
1399                 DPRINTK("ARB resp: cmd=%02X\n", readb(ti->arb));
1400 #endif
1401
1402                 switch (readb(ti->arb)) {       /* ARB command check */
1403                 case DLC_STATUS:
1404                         DPRINTK("DLC_STATUS new status: %02X on station %02X\n",
1405                                 ntohs(readw(ti->arb + STATUS_OFST)),
1406                                 ntohs(readw(ti->arb+ STATION_ID_OFST)));
1407                         break;
1408                 case REC_DATA:
1409                         tr_rx(dev);
1410                         break;
1411                 case RING_STAT_CHANGE:{
1412                         unsigned short ring_status;
1413                         ring_status= ntohs(readw(ti->arb + NETW_STATUS_OFST));
1414                         if (ibmtr_debug_trace & TRC_INIT)
1415                                 DPRINTK("Ring Status Change...(0x%x)\n",
1416                                                                 ring_status);
1417                         if(ring_status& (REMOVE_RECV|AUTO_REMOVAL|LOBE_FAULT)){
1418                                 netif_stop_queue(dev);
1419                                 netif_carrier_off(dev);
1420                                 DPRINTK("Remove received, or Auto-removal error"
1421                                         ", or Lobe fault\n");
1422                                 DPRINTK("We'll try to reopen the closed adapter"
1423                                         " after a %d second delay.\n",
1424                                                 TR_RETRY_INTERVAL/HZ);
1425                                 /*I was confused: I saw the TR reopening but */
1426                                 /*forgot:with an RJ45 in an RJ45/ICS adapter */
1427                                 /*but adapter not in the ring, the TR will   */
1428                                 /* open, and then soon close and come here.  */
1429                                 ti->open_mode = AUTOMATIC;
1430                                 ti->open_status = CLOSED; /*12/2000 BMS*/
1431                                 ti->open_action = REOPEN;
1432                                 ibmtr_reset_timer(&(ti->tr_timer), dev);
1433                         } else if (ring_status & LOG_OVERFLOW) {
1434                                 if(netif_queue_stopped(dev))
1435                                         ti->readlog_pending = 1;
1436                                 else
1437                                         ibmtr_readlog(dev);
1438                         }
1439                         break;
1440                 }
1441                 case XMIT_DATA_REQ:
1442                         tr_tx(dev);
1443                         break;
1444                 default:
1445                         DPRINTK("Unknown command %02X in arb\n",
1446                                                 (int) readb(ti->arb));
1447                         break;
1448                 }       /* switch ARB command check */
1449                 writeb(~ARB_CMD_INT, ti->mmio+ ACA_OFFSET+ACA_RESET + ISRP_ODD);
1450                 writeb(ARB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1451         }       /* if ARB response */
1452         if (status & SSB_RESP_INT) {    /* SSB response */
1453                 unsigned char retcode;
1454                 SET_PAGE(ti->ssb_page);
1455 #if TR_VERBOSE
1456                 DPRINTK("SSB resp: cmd=%02X rsp=%02X\n",
1457                                 readb(ti->ssb), readb(ti->ssb + 2));
1458 #endif
1459
1460                 switch (readb(ti->ssb)) {       /* SSB command check */
1461                 case XMIT_DIR_FRAME:
1462                 case XMIT_UI_FRAME:
1463                         retcode = readb(ti->ssb + 2);
1464                         if (retcode && (retcode != 0x22))/* checks ret_code */
1465                                 DPRINTK("xmit ret_code: %02X xmit error code: "
1466                                         "%02X\n",
1467                                         (int)retcode, (int)readb(ti->ssb + 6));
1468                         else
1469                                 ti->tr_stats.tx_packets++;
1470                         break;
1471                 case XMIT_XID_CMD:
1472                         DPRINTK("xmit xid ret_code: %02X\n",
1473                                                 (int) readb(ti->ssb + 2));
1474                 default:
1475                         DPRINTK("Unknown command %02X in ssb\n",
1476                                                 (int) readb(ti->ssb));
1477                 }       /* SSB command check */
1478                 writeb(~SSB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
1479                 writeb(SSB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1480         }       /* if SSB response */
1481 #ifdef ENABLE_PAGING
1482         writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1483 #endif
1484         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1485         spin_unlock(&(ti->lock));
1486         return IRQ_HANDLED;
1487 }                               /*tok_interrupt */
1488
1489 /*****************************************************************************/
1490
1491 #define INIT_STATUS_OFST        1
1492 #define INIT_STATUS_2_OFST      2
1493 #define ENCODED_ADDRESS_OFST    8
1494
1495 static void initial_tok_int(struct net_device *dev)
1496 {
1497
1498         __u32 encoded_addr, hw_encoded_addr;
1499         struct tok_info *ti;
1500         unsigned char init_status; /*BMS 12/2000*/
1501
1502         ti = (struct tok_info *) dev->priv;
1503
1504         ti->do_tok_int = NOT_FIRST;
1505
1506         /* we assign the shared-ram address for ISA devices */
1507         writeb(ti->sram_base, ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN);
1508 #ifndef PCMCIA
1509         ti->sram_virt = ioremap(((__u32)ti->sram_base << 12), ti->avail_shared_ram);
1510 #endif
1511         ti->init_srb = map_address(ti,
1512                 ntohs(readw(ti->mmio + ACA_OFFSET + WRBR_EVEN)),
1513                 &ti->init_srb_page);
1514         if (ti->page_mask && ti->avail_shared_ram == 127) {
1515                 void __iomem *last_512;
1516                 __u8 last_512_page=0;
1517                 int i;
1518                 last_512 = map_address(ti, 0xfe00, &last_512_page);
1519                 /* initialize high section of ram (if necessary) */
1520                 SET_PAGE(last_512_page);
1521                 for (i = 0; i < 512; i++)
1522                         writeb(0, last_512 + i);
1523         }
1524         SET_PAGE(ti->init_srb_page);
1525
1526 #if TR_VERBOSE
1527         {
1528         int i;
1529
1530         DPRINTK("ti->init_srb_page=0x%x\n", ti->init_srb_page);
1531         DPRINTK("init_srb(%p):", ti->init_srb );
1532         for (i = 0; i < 20; i++)
1533                 printk("%02X ", (int) readb(ti->init_srb + i));
1534         printk("\n");
1535         }
1536 #endif
1537
1538         hw_encoded_addr = readw(ti->init_srb + ENCODED_ADDRESS_OFST);
1539         encoded_addr = ntohs(hw_encoded_addr);
1540         init_status= /*BMS 12/2000 check for shallow mode possibility (Turbo)*/
1541         readb(ti->init_srb+offsetof(struct srb_init_response,init_status));
1542         /*printk("Initial interrupt: init_status= 0x%02x\n",init_status);*/
1543         ti->ring_speed = init_status & 0x01 ? 16 : 4;
1544         DPRINTK("Initial interrupt : %d Mbps, shared RAM base %08x.\n",
1545                                 ti->ring_speed, (unsigned int)dev->mem_start);
1546         ti->auto_speedsave=readb(ti->init_srb+INIT_STATUS_2_OFST)&4?TRUE:FALSE;
1547
1548         if (ti->open_mode == MANUAL)    wake_up(&ti->wait_for_reset);
1549         else                            tok_open_adapter((unsigned long)dev);
1550         
1551 } /*initial_tok_int() */
1552
1553 /*****************************************************************************/
1554
1555 #define CMD_CORRELATE_OFST      1
1556 #define DHB_ADDRESS_OFST        6
1557
1558 #define FRAME_LENGTH_OFST       6
1559 #define HEADER_LENGTH_OFST      8
1560 #define RSAP_VALUE_OFST         9
1561
1562 static void tr_tx(struct net_device *dev)
1563 {
1564         struct tok_info *ti = (struct tok_info *) dev->priv;
1565         struct trh_hdr *trhdr = (struct trh_hdr *) ti->current_skb->data;
1566         unsigned int hdr_len;
1567         __u32 dhb=0,dhb_base;
1568         void __iomem *dhbuf = NULL;
1569         unsigned char xmit_command;
1570         int i,dhb_len=0x4000,src_len,src_offset;
1571         struct trllc *llc;
1572         struct srb_xmit xsrb;
1573         __u8 dhb_page = 0;
1574         __u8 llc_ssap;
1575
1576         SET_PAGE(ti->asb_page);
1577
1578         if (readb(ti->asb+RETCODE_OFST) != 0xFF) DPRINTK("ASB not free !!!\n");
1579
1580         /* in providing the transmit interrupts, is telling us it is ready for
1581            data and providing a shared memory address for us to stuff with data.
1582            Here we compute the effective address where we will place data.
1583         */
1584         SET_PAGE(ti->arb_page);
1585         dhb=dhb_base=ntohs(readw(ti->arb + DHB_ADDRESS_OFST));
1586         if (ti->page_mask) {
1587                 dhb_page = (dhb_base >> 8) & ti->page_mask;
1588                 dhb=dhb_base & ~(ti->page_mask << 8);
1589         }
1590         dhbuf = ti->sram_virt + dhb;
1591
1592         /* Figure out the size of the 802.5 header */
1593         if (!(trhdr->saddr[0] & 0x80))  /* RIF present? */
1594                 hdr_len = sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1595         else
1596                 hdr_len = ((ntohs(trhdr->rcf) & TR_RCF_LEN_MASK) >> 8)
1597                     + sizeof(struct trh_hdr) - TR_MAXRIFLEN;
1598
1599         llc = (struct trllc *) (ti->current_skb->data + hdr_len);
1600
1601         llc_ssap = llc->ssap;
1602         SET_PAGE(ti->srb_page);
1603         memcpy_fromio(&xsrb, ti->srb, sizeof(xsrb));
1604         SET_PAGE(ti->asb_page);
1605         xmit_command = xsrb.command;
1606
1607         writeb(xmit_command, ti->asb + COMMAND_OFST);
1608         writew(xsrb.station_id, ti->asb + STATION_ID_OFST);
1609         writeb(llc_ssap, ti->asb + RSAP_VALUE_OFST);
1610         writeb(xsrb.cmd_corr, ti->asb + CMD_CORRELATE_OFST);
1611         writeb(0, ti->asb + RETCODE_OFST);
1612         if ((xmit_command == XMIT_XID_CMD) || (xmit_command == XMIT_TEST_CMD)) {
1613                 writew(htons(0x11), ti->asb + FRAME_LENGTH_OFST);
1614                 writeb(0x0e, ti->asb + HEADER_LENGTH_OFST);
1615                 SET_PAGE(dhb_page);
1616                 writeb(AC, dhbuf);
1617                 writeb(LLC_FRAME, dhbuf + 1);
1618                 for (i = 0; i < TR_ALEN; i++)
1619                         writeb((int) 0x0FF, dhbuf + i + 2);
1620                 for (i = 0; i < TR_ALEN; i++)
1621                         writeb(0, dhbuf + i + TR_ALEN + 2);
1622                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1623                 return;
1624         }
1625         /*
1626          *    the token ring packet is copied from sk_buff to the adapter
1627          *    buffer identified in the command data received with the interrupt.
1628          */
1629         writeb(hdr_len, ti->asb + HEADER_LENGTH_OFST);
1630         writew(htons(ti->current_skb->len), ti->asb + FRAME_LENGTH_OFST);
1631         src_len=ti->current_skb->len;
1632         src_offset=0;
1633         dhb=dhb_base;
1634         while(1) {
1635                 if (ti->page_mask) {
1636                         dhb_page=(dhb >> 8) & ti->page_mask;
1637                         dhb=dhb & ~(ti->page_mask << 8);
1638                         dhb_len=0x4000-dhb; /* remaining size of this page */
1639                 }
1640                 dhbuf = ti->sram_virt + dhb;
1641                 SET_PAGE(dhb_page);
1642                 if (src_len > dhb_len) {
1643                         memcpy_toio(dhbuf,&ti->current_skb->data[src_offset],
1644                                         dhb_len);
1645                         src_len -= dhb_len;
1646                         src_offset += dhb_len;
1647                         dhb_base+=dhb_len;
1648                         dhb=dhb_base;
1649                         continue;
1650                 }
1651                 memcpy_toio(dhbuf, &ti->current_skb->data[src_offset], src_len);
1652                 break;
1653         }
1654         writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1655         ti->tr_stats.tx_bytes += ti->current_skb->len;
1656         dev_kfree_skb_irq(ti->current_skb);
1657         ti->current_skb = NULL;
1658         netif_wake_queue(dev);
1659         if (ti->readlog_pending)
1660                 ibmtr_readlog(dev);
1661 }                               /*tr_tx */
1662
1663 /*****************************************************************************/
1664
1665
1666 #define RECEIVE_BUFFER_OFST     6
1667 #define LAN_HDR_LENGTH_OFST     8
1668 #define DLC_HDR_LENGTH_OFST     9
1669
1670 #define DSAP_OFST               0
1671 #define SSAP_OFST               1
1672 #define LLC_OFST                2
1673 #define PROTID_OFST             3
1674 #define ETHERTYPE_OFST          6
1675
1676 static void tr_rx(struct net_device *dev)
1677 {
1678         struct tok_info *ti = (struct tok_info *) dev->priv;
1679         __u32 rbuffer;
1680         void __iomem *rbuf, *rbufdata, *llc;
1681         __u8 rbuffer_page = 0;
1682         unsigned char *data;
1683         unsigned int rbuffer_len, lan_hdr_len, hdr_len, ip_len, length;
1684         unsigned char dlc_hdr_len;
1685         struct sk_buff *skb;
1686         unsigned int skb_size = 0;
1687         int IPv4_p = 0;
1688         unsigned int chksum = 0;
1689         struct iphdr *iph;
1690         struct arb_rec_req rarb;
1691
1692         SET_PAGE(ti->arb_page);
1693         memcpy_fromio(&rarb, ti->arb, sizeof(rarb));
1694         rbuffer = ntohs(rarb.rec_buf_addr) ;
1695         rbuf = map_address(ti, rbuffer, &rbuffer_page);
1696
1697         SET_PAGE(ti->asb_page);
1698
1699         if (readb(ti->asb + RETCODE_OFST) !=0xFF) DPRINTK("ASB not free !!!\n");
1700
1701         writeb(REC_DATA, ti->asb + COMMAND_OFST);
1702         writew(rarb.station_id, ti->asb + STATION_ID_OFST);
1703         writew(rarb.rec_buf_addr, ti->asb + RECEIVE_BUFFER_OFST);
1704
1705         lan_hdr_len = rarb.lan_hdr_len;
1706         if (lan_hdr_len > sizeof(struct trh_hdr)) {
1707                 DPRINTK("Linux cannot handle greater than 18 bytes RIF\n");
1708                 return;
1709         }                       /*BMS I added this above just to be very safe */
1710         dlc_hdr_len = readb(ti->arb + DLC_HDR_LENGTH_OFST);
1711         hdr_len = lan_hdr_len + sizeof(struct trllc) + sizeof(struct iphdr);
1712
1713         SET_PAGE(rbuffer_page);
1714         llc = rbuf + offsetof(struct rec_buf, data) + lan_hdr_len;
1715
1716 #if TR_VERBOSE
1717         DPRINTK("offsetof data: %02X lan_hdr_len: %02X\n",
1718         (__u32) offsetof(struct rec_buf, data), (unsigned int) lan_hdr_len);
1719         DPRINTK("llc: %08X rec_buf_addr: %04X dev->mem_start: %lX\n",
1720                 llc, ntohs(rarb.rec_buf_addr), dev->mem_start);
1721         DPRINTK("dsap: %02X, ssap: %02X, llc: %02X, protid: %02X%02X%02X, "
1722                 "ethertype: %04X\n",
1723                 (int) readb(llc + DSAP_OFST), (int) readb(llc + SSAP_OFST),
1724                 (int) readb(llc + LLC_OFST), (int) readb(llc + PROTID_OFST),
1725                 (int) readb(llc+PROTID_OFST+1),(int)readb(llc+PROTID_OFST + 2),
1726                 (int) ntohs(readw(llc + ETHERTYPE_OFST)));
1727 #endif
1728         if (readb(llc + offsetof(struct trllc, llc)) != UI_CMD) {
1729                 SET_PAGE(ti->asb_page);
1730                 writeb(DATA_LOST, ti->asb + RETCODE_OFST);
1731                 ti->tr_stats.rx_dropped++;
1732                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1733                 return;
1734         }
1735         length = ntohs(rarb.frame_len);
1736         if (readb(llc + DSAP_OFST) == EXTENDED_SAP &&
1737            readb(llc + SSAP_OFST) == EXTENDED_SAP &&
1738                 length >= hdr_len)      IPv4_p = 1;
1739 #if TR_VERBOSE
1740 #define SADDR_OFST      8
1741 #define DADDR_OFST      2
1742
1743         if (!IPv4_p) {
1744
1745                 void __iomem *trhhdr = rbuf + offsetof(struct rec_buf, data);
1746
1747                 DPRINTK("Probably non-IP frame received.\n");
1748                 DPRINTK("ssap: %02X dsap: %02X "
1749                         "saddr: %02X:%02X:%02X:%02X:%02X:%02X "
1750                         "daddr: %02X:%02X:%02X:%02X:%02X:%02X\n",
1751                         readb(llc + SSAP_OFST), readb(llc + DSAP_OFST),
1752                         readb(trhhdr+SADDR_OFST), readb(trhhdr+ SADDR_OFST+1),
1753                         readb(trhhdr+SADDR_OFST+2), readb(trhhdr+SADDR_OFST+3),
1754                         readb(trhhdr+SADDR_OFST+4), readb(trhhdr+SADDR_OFST+5),
1755                         readb(trhhdr+DADDR_OFST), readb(trhhdr+DADDR_OFST + 1),
1756                         readb(trhhdr+DADDR_OFST+2), readb(trhhdr+DADDR_OFST+3),
1757                         readb(trhhdr+DADDR_OFST+4), readb(trhhdr+DADDR_OFST+5));
1758         }
1759 #endif
1760
1761         /*BMS handle the case she comes in with few hops but leaves with many */
1762         skb_size=length-lan_hdr_len+sizeof(struct trh_hdr)+sizeof(struct trllc);
1763
1764         if (!(skb = dev_alloc_skb(skb_size))) {
1765                 DPRINTK("out of memory. frame dropped.\n");
1766                 ti->tr_stats.rx_dropped++;
1767                 SET_PAGE(ti->asb_page);
1768                 writeb(DATA_LOST, ti->asb + offsetof(struct asb_rec, ret_code));
1769                 writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1770                 return;
1771         }
1772         /*BMS again, if she comes in with few but leaves with many */
1773         skb_reserve(skb, sizeof(struct trh_hdr) - lan_hdr_len);
1774         skb_put(skb, length);
1775         skb->dev = dev;
1776         data = skb->data;
1777         rbuffer_len = ntohs(readw(rbuf + offsetof(struct rec_buf, buf_len)));
1778         rbufdata = rbuf + offsetof(struct rec_buf, data);
1779
1780         if (IPv4_p) {
1781                 /* Copy the headers without checksumming */
1782                 memcpy_fromio(data, rbufdata, hdr_len);
1783
1784                 /* Watch for padded packets and bogons */
1785                 iph= (struct iphdr *)(data+ lan_hdr_len + sizeof(struct trllc));
1786                 ip_len = ntohs(iph->tot_len) - sizeof(struct iphdr);
1787                 length -= hdr_len;
1788                 if ((ip_len <= length) && (ip_len > 7))
1789                         length = ip_len;
1790                 data += hdr_len;
1791                 rbuffer_len -= hdr_len;
1792                 rbufdata += hdr_len;
1793         }
1794         /* Copy the payload... */
1795 #define BUFFER_POINTER_OFST     2
1796 #define BUFFER_LENGTH_OFST      6
1797         for (;;) {
1798                 if (ibmtr_debug_trace&TRC_INITV && length < rbuffer_len)
1799                         DPRINTK("CURIOUS, length=%d < rbuffer_len=%d\n",
1800                                                 length,rbuffer_len);
1801                 if (IPv4_p)
1802                         chksum=csum_partial_copy_nocheck((void*)rbufdata,
1803                             data,length<rbuffer_len?length:rbuffer_len,chksum);
1804                 else
1805                         memcpy_fromio(data, rbufdata, rbuffer_len);
1806                 rbuffer = ntohs(readw(rbuf+BUFFER_POINTER_OFST)) ;
1807                 if (!rbuffer)
1808                         break;
1809                 rbuffer -= 2;
1810                 length -= rbuffer_len;
1811                 data += rbuffer_len;
1812                 rbuf = map_address(ti, rbuffer, &rbuffer_page);
1813                 SET_PAGE(rbuffer_page);
1814                 rbuffer_len = ntohs(readw(rbuf + BUFFER_LENGTH_OFST));
1815                 rbufdata = rbuf + offsetof(struct rec_buf, data);
1816         }
1817
1818         SET_PAGE(ti->asb_page);
1819         writeb(0, ti->asb + offsetof(struct asb_rec, ret_code));
1820
1821         writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1822
1823         ti->tr_stats.rx_bytes += skb->len;
1824         ti->tr_stats.rx_packets++;
1825
1826         skb->protocol = tr_type_trans(skb, dev);
1827         if (IPv4_p) {
1828                 skb->csum = chksum;
1829                 skb->ip_summed = 1;
1830         }
1831         netif_rx(skb);
1832         dev->last_rx = jiffies;
1833 }                               /*tr_rx */
1834
1835 /*****************************************************************************/
1836
1837 static void ibmtr_reset_timer(struct timer_list *tmr, struct net_device *dev)
1838 {
1839         tmr->expires = jiffies + TR_RETRY_INTERVAL;
1840         tmr->data = (unsigned long) dev;
1841         tmr->function = tok_rerun;
1842         init_timer(tmr);
1843         add_timer(tmr);
1844 }
1845
1846 /*****************************************************************************/
1847
1848 void tok_rerun(unsigned long dev_addr){
1849
1850         struct net_device *dev = (struct net_device *)dev_addr;
1851         struct tok_info *ti = (struct tok_info *) dev->priv;
1852
1853         if ( ti->open_action == RESTART){
1854                 ti->do_tok_int = FIRST_INT;
1855                 outb(0, dev->base_addr + ADAPTRESETREL);
1856 #ifdef ENABLE_PAGING
1857                 if (ti->page_mask)
1858                         writeb(SRPR_ENABLE_PAGING,
1859                                 ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
1860 #endif
1861
1862                 writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1863         } else
1864                 tok_open_adapter(dev_addr);
1865 }
1866
1867 /*****************************************************************************/
1868
1869 static void ibmtr_readlog(struct net_device *dev)
1870 {
1871         struct tok_info *ti;
1872
1873         ti = (struct tok_info *) dev->priv;
1874
1875         ti->readlog_pending = 0;
1876         SET_PAGE(ti->srb_page);
1877         writeb(DIR_READ_LOG, ti->srb);
1878         writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
1879         writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
1880
1881         netif_stop_queue(dev);
1882
1883 }
1884
1885 /*****************************************************************************/
1886
1887 /* tok_get_stats():  Basically a scaffold routine which will return
1888    the address of the tr_statistics structure associated with
1889    this device -- the tr.... structure is an ethnet look-alike
1890    so at least for this iteration may suffice.   */
1891
1892 static struct net_device_stats *tok_get_stats(struct net_device *dev)
1893 {
1894
1895         struct tok_info *toki;
1896         toki = (struct tok_info *) dev->priv;
1897         return (struct net_device_stats *) &toki->tr_stats;
1898 }
1899
1900 /*****************************************************************************/
1901
1902 static int ibmtr_change_mtu(struct net_device *dev, int mtu)
1903 {
1904         struct tok_info *ti = (struct tok_info *) dev->priv;
1905
1906         if (ti->ring_speed == 16 && mtu > ti->maxmtu16)
1907                 return -EINVAL;
1908         if (ti->ring_speed == 4 && mtu > ti->maxmtu4)
1909                 return -EINVAL;
1910         dev->mtu = mtu;
1911         return 0;
1912 }
1913
1914 /*****************************************************************************/
1915 #ifdef MODULE
1916
1917 /* 3COM 3C619C supports 8 interrupts, 32 I/O ports */
1918 static struct net_device *dev_ibmtr[IBMTR_MAX_ADAPTERS];
1919 static int io[IBMTR_MAX_ADAPTERS] = { 0xa20, 0xa24 };
1920 static int irq[IBMTR_MAX_ADAPTERS];
1921 static int mem[IBMTR_MAX_ADAPTERS];
1922
1923 MODULE_LICENSE("GPL");
1924
1925 module_param_array(io, int, NULL, 0);
1926 module_param_array(irq, int, NULL, 0);
1927 module_param_array(mem, int, NULL, 0);
1928
1929 static int __init ibmtr_init(void)
1930 {
1931         int i;
1932         int count=0;
1933
1934         find_turbo_adapters(io);
1935
1936         for (i = 0; io[i] && (i < IBMTR_MAX_ADAPTERS); i++) {
1937                 struct net_device *dev;
1938                 irq[i] = 0;
1939                 mem[i] = 0;
1940                 dev = alloc_trdev(sizeof(struct tok_info));
1941                 if (dev == NULL) { 
1942                         if (i == 0)
1943                                 return -ENOMEM;
1944                         break;
1945                 }
1946                 dev->base_addr = io[i];
1947                 dev->irq = irq[i];
1948                 dev->mem_start = mem[i];
1949
1950                 if (ibmtr_probe_card(dev)) {
1951                         free_netdev(dev);
1952                         continue;
1953                 }
1954                 dev_ibmtr[i] = dev;
1955                 count++;
1956         }
1957         if (count) return 0;
1958         printk("ibmtr: register_netdev() returned non-zero.\n");
1959         return -EIO;
1960 }
1961 module_init(ibmtr_init);
1962
1963 static void __exit ibmtr_cleanup(void)
1964 {
1965         int i;
1966
1967         for (i = 0; i < IBMTR_MAX_ADAPTERS; i++){
1968                 if (!dev_ibmtr[i])
1969                         continue;
1970                 unregister_netdev(dev_ibmtr[i]);
1971                 ibmtr_cleanup_card(dev_ibmtr[i]);
1972                 free_netdev(dev_ibmtr[i]);
1973         }
1974 }
1975 module_exit(ibmtr_cleanup);
1976 #endif