[PATCH] voyager: no need to define BITS_PER_BYTE when it's already in types.h
[linux-2.6.git] / arch / i386 / mach-voyager / voyager_cat.c
1 /* -*- mode: c; c-basic-offset: 8 -*- */
2
3 /* Copyright (C) 1999,2001
4  *
5  * Author: J.E.J.Bottomley@HansenPartnership.com
6  *
7  * linux/arch/i386/kernel/voyager_cat.c
8  *
9  * This file contains all the logic for manipulating the CAT bus
10  * in a level 5 machine.
11  *
12  * The CAT bus is a serial configuration and test bus.  Its primary
13  * uses are to probe the initial configuration of the system and to
14  * diagnose error conditions when a system interrupt occurs.  The low
15  * level interface is fairly primitive, so most of this file consists
16  * of bit shift manipulations to send and receive packets on the
17  * serial bus */
18
19 #include <linux/config.h>
20 #include <linux/types.h>
21 #include <linux/completion.h>
22 #include <linux/sched.h>
23 #include <asm/voyager.h>
24 #include <asm/vic.h>
25 #include <linux/ioport.h>
26 #include <linux/init.h>
27 #include <linux/slab.h>
28 #include <linux/delay.h>
29 #include <asm/io.h>
30
31 #ifdef VOYAGER_CAT_DEBUG
32 #define CDEBUG(x)       printk x
33 #else
34 #define CDEBUG(x)
35 #endif
36
37 /* the CAT command port */
38 #define CAT_CMD         (sspb + 0xe)
39 /* the CAT data port */
40 #define CAT_DATA        (sspb + 0xd)
41
42 /* the internal cat functions */
43 static void cat_pack(__u8 *msg, __u16 start_bit, __u8 *data, 
44                      __u16 num_bits);
45 static void cat_unpack(__u8 *msg, __u16 start_bit, __u8 *data,
46                        __u16 num_bits);
47 static void cat_build_header(__u8 *header, const __u16 len, 
48                              const __u16 smallest_reg_bits,
49                              const __u16 longest_reg_bits);
50 static int cat_sendinst(voyager_module_t *modp, voyager_asic_t *asicp,
51                         __u8 reg, __u8 op);
52 static int cat_getdata(voyager_module_t *modp, voyager_asic_t *asicp,
53                        __u8 reg, __u8 *value);
54 static int cat_shiftout(__u8 *data, __u16 data_bytes, __u16 header_bytes,
55                         __u8 pad_bits);
56 static int cat_write(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
57                      __u8 value);
58 static int cat_read(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
59                     __u8 *value);
60 static int cat_subread(voyager_module_t *modp, voyager_asic_t *asicp,
61                        __u16 offset, __u16 len, void *buf);
62 static int cat_senddata(voyager_module_t *modp, voyager_asic_t *asicp,
63                         __u8 reg, __u8 value);
64 static int cat_disconnect(voyager_module_t *modp, voyager_asic_t *asicp);
65 static int cat_connect(voyager_module_t *modp, voyager_asic_t *asicp);
66
67 static inline const char *
68 cat_module_name(int module_id)
69 {
70         switch(module_id) {
71         case 0x10:
72                 return "Processor Slot 0";
73         case 0x11:
74                 return "Processor Slot 1";
75         case 0x12:
76                 return "Processor Slot 2";
77         case 0x13:
78                 return "Processor Slot 4";
79         case 0x14:
80                 return "Memory Slot 0";
81         case 0x15:
82                 return "Memory Slot 1";
83         case 0x18:
84                 return "Primary Microchannel";
85         case 0x19:
86                 return "Secondary Microchannel";
87         case 0x1a:
88                 return "Power Supply Interface";
89         case 0x1c:
90                 return "Processor Slot 5";
91         case 0x1d:
92                 return "Processor Slot 6";
93         case 0x1e:
94                 return "Processor Slot 7";
95         case 0x1f:
96                 return "Processor Slot 8";
97         default:
98                 return "Unknown Module";
99         }
100 }
101
102 static int sspb = 0;            /* stores the super port location */
103 int voyager_8slot = 0;          /* set to true if a 51xx monster */
104
105 voyager_module_t *voyager_cat_list;
106
107 /* the I/O port assignments for the VIC and QIC */
108 static struct resource vic_res = {
109         .name   = "Voyager Interrupt Controller",
110         .start  = 0xFC00,
111         .end    = 0xFC6F
112 };
113 static struct resource qic_res = {
114         .name   = "Quad Interrupt Controller",
115         .start  = 0xFC70,
116         .end    = 0xFCFF
117 };
118
119 /* This function is used to pack a data bit stream inside a message.
120  * It writes num_bits of the data buffer in msg starting at start_bit.
121  * Note: This function assumes that any unused bit in the data stream
122  * is set to zero so that the ors will work correctly */
123 static void
124 cat_pack(__u8 *msg, const __u16 start_bit, __u8 *data, const __u16 num_bits)
125 {
126         /* compute initial shift needed */
127         const __u16 offset = start_bit % BITS_PER_BYTE;
128         __u16 len = num_bits / BITS_PER_BYTE;
129         __u16 byte = start_bit / BITS_PER_BYTE;
130         __u16 residue = (num_bits % BITS_PER_BYTE) + offset;
131         int i;
132
133         /* adjust if we have more than a byte of residue */
134         if(residue >= BITS_PER_BYTE) {
135                 residue -= BITS_PER_BYTE;
136                 len++;
137         }
138
139         /* clear out the bits.  We assume here that if len==0 then
140          * residue >= offset.  This is always true for the catbus
141          * operations */
142         msg[byte] &= 0xff << (BITS_PER_BYTE - offset); 
143         msg[byte++] |= data[0] >> offset;
144         if(len == 0)
145                 return;
146         for(i = 1; i < len; i++)
147                 msg[byte++] = (data[i-1] << (BITS_PER_BYTE - offset))
148                         | (data[i] >> offset);
149         if(residue != 0) {
150                 __u8 mask = 0xff >> residue;
151                 __u8 last_byte = data[i-1] << (BITS_PER_BYTE - offset)
152                         | (data[i] >> offset);
153                 
154                 last_byte &= ~mask;
155                 msg[byte] &= mask;
156                 msg[byte] |= last_byte;
157         }
158         return;
159 }
160 /* unpack the data again (same arguments as cat_pack()). data buffer
161  * must be zero populated.
162  *
163  * Function: given a message string move to start_bit and copy num_bits into
164  * data (starting at bit 0 in data).
165  */
166 static void
167 cat_unpack(__u8 *msg, const __u16 start_bit, __u8 *data, const __u16 num_bits)
168 {
169         /* compute initial shift needed */
170         const __u16 offset = start_bit % BITS_PER_BYTE;
171         __u16 len = num_bits / BITS_PER_BYTE;
172         const __u8 last_bits = num_bits % BITS_PER_BYTE;
173         __u16 byte = start_bit / BITS_PER_BYTE;
174         int i;
175
176         if(last_bits != 0)
177                 len++;
178
179         /* special case: want < 8 bits from msg and we can get it from
180          * a single byte of the msg */
181         if(len == 0 && BITS_PER_BYTE - offset >= num_bits) {
182                 data[0] = msg[byte] << offset;
183                 data[0] &= 0xff >> (BITS_PER_BYTE - num_bits);
184                 return;
185         }
186         for(i = 0; i < len; i++) {
187                 /* this annoying if has to be done just in case a read of
188                  * msg one beyond the array causes a panic */
189                 if(offset != 0) {
190                         data[i] = msg[byte++] << offset;
191                         data[i] |= msg[byte] >> (BITS_PER_BYTE - offset);
192                 }
193                 else {
194                         data[i] = msg[byte++];
195                 }
196         }
197         /* do we need to truncate the final byte */
198         if(last_bits != 0) {
199                 data[i-1] &= 0xff << (BITS_PER_BYTE - last_bits);
200         }
201         return;
202 }
203
204 static void
205 cat_build_header(__u8 *header, const __u16 len, const __u16 smallest_reg_bits,
206                  const __u16 longest_reg_bits)
207 {
208         int i;
209         __u16 start_bit = (smallest_reg_bits - 1) % BITS_PER_BYTE;
210         __u8 *last_byte = &header[len - 1];
211
212         if(start_bit == 0)
213                 start_bit = 1;  /* must have at least one bit in the hdr */
214         
215         for(i=0; i < len; i++)
216                 header[i] = 0;
217
218         for(i = start_bit; i > 0; i--)
219                 *last_byte = ((*last_byte) << 1) + 1;
220
221 }
222
223 static int
224 cat_sendinst(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg, __u8 op)
225 {
226         __u8 parity, inst, inst_buf[4] = { 0 };
227         __u8 iseq[VOYAGER_MAX_SCAN_PATH], hseq[VOYAGER_MAX_REG_SIZE];
228         __u16 ibytes, hbytes, padbits;
229         int i;
230         
231         /* 
232          * Parity is the parity of the register number + 1 (READ_REGISTER
233          * and WRITE_REGISTER always add '1' to the number of bits == 1)
234          */
235         parity = (__u8)(1 + (reg & 0x01) +
236                  ((__u8)(reg & 0x02) >> 1) +
237                  ((__u8)(reg & 0x04) >> 2) +
238                  ((__u8)(reg & 0x08) >> 3)) % 2;
239
240         inst = ((parity << 7) | (reg << 2) | op);
241
242         outb(VOYAGER_CAT_IRCYC, CAT_CMD);
243         if(!modp->scan_path_connected) {
244                 if(asicp->asic_id != VOYAGER_CAT_ID) {
245                         printk("**WARNING***: cat_sendinst has disconnected scan path not to CAT asic\n");
246                         return 1;
247                 }
248                 outb(VOYAGER_CAT_HEADER, CAT_DATA);
249                 outb(inst, CAT_DATA);
250                 if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
251                         CDEBUG(("VOYAGER CAT: cat_sendinst failed to get CAT_HEADER\n"));
252                         return 1;
253                 }
254                 return 0;
255         }
256         ibytes = modp->inst_bits / BITS_PER_BYTE;
257         if((padbits = modp->inst_bits % BITS_PER_BYTE) != 0) {
258                 padbits = BITS_PER_BYTE - padbits;
259                 ibytes++;
260         }
261         hbytes = modp->largest_reg / BITS_PER_BYTE;
262         if(modp->largest_reg % BITS_PER_BYTE)
263                 hbytes++;
264         CDEBUG(("cat_sendinst: ibytes=%d, hbytes=%d\n", ibytes, hbytes));
265         /* initialise the instruction sequence to 0xff */
266         for(i=0; i < ibytes + hbytes; i++)
267                 iseq[i] = 0xff;
268         cat_build_header(hseq, hbytes, modp->smallest_reg, modp->largest_reg);
269         cat_pack(iseq, modp->inst_bits, hseq, hbytes * BITS_PER_BYTE);
270         inst_buf[0] = inst;
271         inst_buf[1] = 0xFF >> (modp->largest_reg % BITS_PER_BYTE);
272         cat_pack(iseq, asicp->bit_location, inst_buf, asicp->ireg_length);
273 #ifdef VOYAGER_CAT_DEBUG
274         printk("ins = 0x%x, iseq: ", inst);
275         for(i=0; i< ibytes + hbytes; i++)
276                 printk("0x%x ", iseq[i]);
277         printk("\n");
278 #endif
279         if(cat_shiftout(iseq, ibytes, hbytes, padbits)) {
280                 CDEBUG(("VOYAGER CAT: cat_sendinst: cat_shiftout failed\n"));
281                 return 1;
282         }
283         CDEBUG(("CAT SHIFTOUT DONE\n"));
284         return 0;
285 }
286
287 static int
288 cat_getdata(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg, 
289             __u8 *value)
290 {
291         if(!modp->scan_path_connected) {
292                 if(asicp->asic_id != VOYAGER_CAT_ID) {
293                         CDEBUG(("VOYAGER CAT: ERROR: cat_getdata to CAT asic with scan path connected\n"));
294                         return 1;
295                 }
296                 if(reg > VOYAGER_SUBADDRHI) 
297                         outb(VOYAGER_CAT_RUN, CAT_CMD);
298                 outb(VOYAGER_CAT_DRCYC, CAT_CMD);
299                 outb(VOYAGER_CAT_HEADER, CAT_DATA);
300                 *value = inb(CAT_DATA);
301                 outb(0xAA, CAT_DATA);
302                 if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
303                         CDEBUG(("cat_getdata: failed to get VOYAGER_CAT_HEADER\n"));
304                         return 1;
305                 }
306                 return 0;
307         }
308         else {
309                 __u16 sbits = modp->num_asics -1 + asicp->ireg_length;
310                 __u16 sbytes = sbits / BITS_PER_BYTE;
311                 __u16 tbytes;
312                 __u8 string[VOYAGER_MAX_SCAN_PATH], trailer[VOYAGER_MAX_REG_SIZE];
313                 __u8 padbits;
314                 int i;
315                 
316                 outb(VOYAGER_CAT_DRCYC, CAT_CMD);
317
318                 if((padbits = sbits % BITS_PER_BYTE) != 0) {
319                         padbits = BITS_PER_BYTE - padbits;
320                         sbytes++;
321                 }
322                 tbytes = asicp->ireg_length / BITS_PER_BYTE;
323                 if(asicp->ireg_length % BITS_PER_BYTE)
324                         tbytes++;
325                 CDEBUG(("cat_getdata: tbytes = %d, sbytes = %d, padbits = %d\n",
326                         tbytes, sbytes, padbits));
327                 cat_build_header(trailer, tbytes, 1, asicp->ireg_length);
328
329                 
330                 for(i = tbytes - 1; i >= 0; i--) {
331                         outb(trailer[i], CAT_DATA);
332                         string[sbytes + i] = inb(CAT_DATA);
333                 }
334
335                 for(i = sbytes - 1; i >= 0; i--) {
336                         outb(0xaa, CAT_DATA);
337                         string[i] = inb(CAT_DATA);
338                 }
339                 *value = 0;
340                 cat_unpack(string, padbits + (tbytes * BITS_PER_BYTE) + asicp->asic_location, value, asicp->ireg_length);
341 #ifdef VOYAGER_CAT_DEBUG
342                 printk("value=0x%x, string: ", *value);
343                 for(i=0; i< tbytes+sbytes; i++)
344                         printk("0x%x ", string[i]);
345                 printk("\n");
346 #endif
347                 
348                 /* sanity check the rest of the return */
349                 for(i=0; i < tbytes; i++) {
350                         __u8 input = 0;
351
352                         cat_unpack(string, padbits + (i * BITS_PER_BYTE), &input, BITS_PER_BYTE);
353                         if(trailer[i] != input) {
354                                 CDEBUG(("cat_getdata: failed to sanity check rest of ret(%d) 0x%x != 0x%x\n", i, input, trailer[i]));
355                                 return 1;
356                         }
357                 }
358                 CDEBUG(("cat_getdata DONE\n"));
359                 return 0;
360         }
361 }
362
363 static int
364 cat_shiftout(__u8 *data, __u16 data_bytes, __u16 header_bytes, __u8 pad_bits)
365 {
366         int i;
367         
368         for(i = data_bytes + header_bytes - 1; i >= header_bytes; i--)
369                 outb(data[i], CAT_DATA);
370
371         for(i = header_bytes - 1; i >= 0; i--) {
372                 __u8 header = 0;
373                 __u8 input;
374
375                 outb(data[i], CAT_DATA);
376                 input = inb(CAT_DATA);
377                 CDEBUG(("cat_shiftout: returned 0x%x\n", input));
378                 cat_unpack(data, ((data_bytes + i) * BITS_PER_BYTE) - pad_bits,
379                            &header, BITS_PER_BYTE);
380                 if(input != header) {
381                         CDEBUG(("VOYAGER CAT: cat_shiftout failed to return header 0x%x != 0x%x\n", input, header));
382                         return 1;
383                 }
384         }
385         return 0;
386 }
387
388 static int
389 cat_senddata(voyager_module_t *modp, voyager_asic_t *asicp, 
390              __u8 reg, __u8 value)
391 {
392         outb(VOYAGER_CAT_DRCYC, CAT_CMD);
393         if(!modp->scan_path_connected) {
394                 if(asicp->asic_id != VOYAGER_CAT_ID) {
395                         CDEBUG(("VOYAGER CAT: ERROR: scan path disconnected when asic != CAT\n"));
396                         return 1;
397                 }
398                 outb(VOYAGER_CAT_HEADER, CAT_DATA);
399                 outb(value, CAT_DATA);
400                 if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
401                         CDEBUG(("cat_senddata: failed to get correct header response to sent data\n"));
402                         return 1;
403                 }
404                 if(reg > VOYAGER_SUBADDRHI) {
405                         outb(VOYAGER_CAT_RUN, CAT_CMD);
406                         outb(VOYAGER_CAT_END, CAT_CMD);
407                         outb(VOYAGER_CAT_RUN, CAT_CMD);
408                 }
409                 
410                 return 0;
411         }
412         else {
413                 __u16 hbytes = asicp->ireg_length / BITS_PER_BYTE;
414                 __u16 dbytes = (modp->num_asics - 1 + asicp->ireg_length)/BITS_PER_BYTE;
415                 __u8 padbits, dseq[VOYAGER_MAX_SCAN_PATH], 
416                         hseq[VOYAGER_MAX_REG_SIZE];
417                 int i;
418
419                 if((padbits = (modp->num_asics - 1 
420                                + asicp->ireg_length) % BITS_PER_BYTE) != 0) {
421                         padbits = BITS_PER_BYTE - padbits;
422                         dbytes++;
423                 }
424                 if(asicp->ireg_length % BITS_PER_BYTE)
425                         hbytes++;
426                 
427                 cat_build_header(hseq, hbytes, 1, asicp->ireg_length);
428                 
429                 for(i = 0; i < dbytes + hbytes; i++)
430                         dseq[i] = 0xff;
431                 CDEBUG(("cat_senddata: dbytes=%d, hbytes=%d, padbits=%d\n",
432                         dbytes, hbytes, padbits));
433                 cat_pack(dseq, modp->num_asics - 1 + asicp->ireg_length,
434                          hseq, hbytes * BITS_PER_BYTE);
435                 cat_pack(dseq, asicp->asic_location, &value, 
436                          asicp->ireg_length);
437 #ifdef VOYAGER_CAT_DEBUG
438                 printk("dseq ");
439                 for(i=0; i<hbytes+dbytes; i++) {
440                         printk("0x%x ", dseq[i]);
441                 }
442                 printk("\n");
443 #endif
444                 return cat_shiftout(dseq, dbytes, hbytes, padbits);
445         }
446 }
447
448 static int
449 cat_write(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
450          __u8 value)
451 {
452         if(cat_sendinst(modp, asicp, reg, VOYAGER_WRITE_CONFIG))
453                 return 1;
454         return cat_senddata(modp, asicp, reg, value);
455 }
456
457 static int
458 cat_read(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
459          __u8 *value)
460 {
461         if(cat_sendinst(modp, asicp, reg, VOYAGER_READ_CONFIG))
462                 return 1;
463         return cat_getdata(modp, asicp, reg, value);
464 }
465
466 static int
467 cat_subaddrsetup(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
468                  __u16 len)
469 {
470         __u8 val;
471
472         if(len > 1) {
473                 /* set auto increment */
474                 __u8 newval;
475                 
476                 if(cat_read(modp, asicp, VOYAGER_AUTO_INC_REG, &val)) {
477                         CDEBUG(("cat_subaddrsetup: read of VOYAGER_AUTO_INC_REG failed\n"));
478                         return 1;
479                 }
480                 CDEBUG(("cat_subaddrsetup: VOYAGER_AUTO_INC_REG = 0x%x\n", val));
481                 newval = val | VOYAGER_AUTO_INC;
482                 if(newval != val) {
483                         if(cat_write(modp, asicp, VOYAGER_AUTO_INC_REG, val)) {
484                                 CDEBUG(("cat_subaddrsetup: write to VOYAGER_AUTO_INC_REG failed\n"));
485                                 return 1;
486                         }
487                 }
488         }
489         if(cat_write(modp, asicp, VOYAGER_SUBADDRLO, (__u8)(offset &0xff))) {
490                 CDEBUG(("cat_subaddrsetup: write to SUBADDRLO failed\n"));
491                 return 1;
492         }
493         if(asicp->subaddr > VOYAGER_SUBADDR_LO) {
494                 if(cat_write(modp, asicp, VOYAGER_SUBADDRHI, (__u8)(offset >> 8))) {
495                         CDEBUG(("cat_subaddrsetup: write to SUBADDRHI failed\n"));
496                         return 1;
497                 }
498                 cat_read(modp, asicp, VOYAGER_SUBADDRHI, &val);
499                 CDEBUG(("cat_subaddrsetup: offset = %d, hi = %d\n", offset, val));
500         }
501         cat_read(modp, asicp, VOYAGER_SUBADDRLO, &val);
502         CDEBUG(("cat_subaddrsetup: offset = %d, lo = %d\n", offset, val));
503         return 0;
504 }
505                 
506 static int
507 cat_subwrite(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
508             __u16 len, void *buf)
509 {
510         int i, retval;
511
512         /* FIXME: need special actions for VOYAGER_CAT_ID here */
513         if(asicp->asic_id == VOYAGER_CAT_ID) {
514                 CDEBUG(("cat_subwrite: ATTEMPT TO WRITE TO CAT ASIC\n"));
515                 /* FIXME -- This is supposed to be handled better
516                  * There is a problem writing to the cat asic in the
517                  * PSI.  The 30us delay seems to work, though */
518                 udelay(30);
519         }
520                 
521         if((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) {
522                 printk("cat_subwrite: cat_subaddrsetup FAILED\n");
523                 return retval;
524         }
525         
526         if(cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_WRITE_CONFIG)) {
527                 printk("cat_subwrite: cat_sendinst FAILED\n");
528                 return 1;
529         }
530         for(i = 0; i < len; i++) {
531                 if(cat_senddata(modp, asicp, 0xFF, ((__u8 *)buf)[i])) {
532                         printk("cat_subwrite: cat_sendata element at %d FAILED\n", i);
533                         return 1;
534                 }
535         }
536         return 0;
537 }
538 static int
539 cat_subread(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
540             __u16 len, void *buf)
541 {
542         int i, retval;
543
544         if((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) {
545                 CDEBUG(("cat_subread: cat_subaddrsetup FAILED\n"));
546                 return retval;
547         }
548
549         if(cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_READ_CONFIG)) {
550                 CDEBUG(("cat_subread: cat_sendinst failed\n"));
551                 return 1;
552         }
553         for(i = 0; i < len; i++) {
554                 if(cat_getdata(modp, asicp, 0xFF,
555                                &((__u8 *)buf)[i])) {
556                         CDEBUG(("cat_subread: cat_getdata element %d failed\n", i));
557                         return 1;
558                 }
559         }
560         return 0;
561 }
562
563
564 /* buffer for storing EPROM data read in during initialisation */
565 static __initdata __u8 eprom_buf[0xFFFF];
566 static voyager_module_t *voyager_initial_module;
567
568 /* Initialise the cat bus components.  We assume this is called by the
569  * boot cpu *after* all memory initialisation has been done (so we can
570  * use kmalloc) but before smp initialisation, so we can probe the SMP
571  * configuration and pick up necessary information.  */
572 void
573 voyager_cat_init(void)
574 {
575         voyager_module_t **modpp = &voyager_initial_module;
576         voyager_asic_t **asicpp;
577         voyager_asic_t *qabc_asic = NULL;
578         int i, j;
579         unsigned long qic_addr = 0;
580         __u8 qabc_data[0x20];
581         __u8 num_submodules, val;
582         voyager_eprom_hdr_t *eprom_hdr = (voyager_eprom_hdr_t *)&eprom_buf[0];
583         
584         __u8 cmos[4];
585         unsigned long addr;
586         
587         /* initiallise the SUS mailbox */
588         for(i=0; i<sizeof(cmos); i++)
589                 cmos[i] = voyager_extended_cmos_read(VOYAGER_DUMP_LOCATION + i);
590         addr = *(unsigned long *)cmos;
591         if((addr & 0xff000000) != 0xff000000) {
592                 printk(KERN_ERR "Voyager failed to get SUS mailbox (addr = 0x%lx\n", addr);
593         } else {
594                 static struct resource res;
595                 
596                 res.name = "voyager SUS";
597                 res.start = addr;
598                 res.end = addr+0x3ff;
599                 
600                 request_resource(&iomem_resource, &res);
601                 voyager_SUS = (struct voyager_SUS *)
602                         ioremap(addr, 0x400);
603                 printk(KERN_NOTICE "Voyager SUS mailbox version 0x%x\n",
604                        voyager_SUS->SUS_version);
605                 voyager_SUS->kernel_version = VOYAGER_MAILBOX_VERSION;
606                 voyager_SUS->kernel_flags = VOYAGER_OS_HAS_SYSINT;
607         }
608
609         /* clear the processor counts */
610         voyager_extended_vic_processors = 0;
611         voyager_quad_processors = 0;
612
613
614
615         printk("VOYAGER: beginning CAT bus probe\n");
616         /* set up the SuperSet Port Block which tells us where the
617          * CAT communication port is */
618         sspb = inb(VOYAGER_SSPB_RELOCATION_PORT) * 0x100;
619         VDEBUG(("VOYAGER DEBUG: sspb = 0x%x\n", sspb));
620
621         /* now find out if were 8 slot or normal */
622         if((inb(VIC_PROC_WHO_AM_I) & EIGHT_SLOT_IDENTIFIER)
623            == EIGHT_SLOT_IDENTIFIER) {
624                 voyager_8slot = 1;
625                 printk(KERN_NOTICE "Voyager: Eight slot 51xx configuration detected\n");
626         }
627
628         for(i = VOYAGER_MIN_MODULE;
629             i <= VOYAGER_MAX_MODULE; i++) {
630                 __u8 input;
631                 int asic;
632                 __u16 eprom_size;
633                 __u16 sp_offset;
634
635                 outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
636                 outb(i, VOYAGER_CAT_CONFIG_PORT);
637
638                 /* check the presence of the module */
639                 outb(VOYAGER_CAT_RUN, CAT_CMD);
640                 outb(VOYAGER_CAT_IRCYC, CAT_CMD);
641                 outb(VOYAGER_CAT_HEADER, CAT_DATA);
642                 /* stream series of alternating 1's and 0's to stimulate
643                  * response */
644                 outb(0xAA, CAT_DATA);
645                 input = inb(CAT_DATA);
646                 outb(VOYAGER_CAT_END, CAT_CMD);
647                 if(input != VOYAGER_CAT_HEADER) {
648                         continue;
649                 }
650                 CDEBUG(("VOYAGER DEBUG: found module id 0x%x, %s\n", i,
651                         cat_module_name(i)));
652                 *modpp = kmalloc(sizeof(voyager_module_t), GFP_KERNEL); /*&voyager_module_storage[cat_count++];*/
653                 if(*modpp == NULL) {
654                         printk("**WARNING** kmalloc failure in cat_init\n");
655                         continue;
656                 }
657                 memset(*modpp, 0, sizeof(voyager_module_t));
658                 /* need temporary asic for cat_subread.  It will be
659                  * filled in correctly later */
660                 (*modpp)->asic = kmalloc(sizeof(voyager_asic_t), GFP_KERNEL); /*&voyager_asic_storage[asic_count];*/
661                 if((*modpp)->asic == NULL) {
662                         printk("**WARNING** kmalloc failure in cat_init\n");
663                         continue;
664                 }
665                 memset((*modpp)->asic, 0, sizeof(voyager_asic_t));
666                 (*modpp)->asic->asic_id = VOYAGER_CAT_ID;
667                 (*modpp)->asic->subaddr = VOYAGER_SUBADDR_HI;
668                 (*modpp)->module_addr = i;
669                 (*modpp)->scan_path_connected = 0;
670                 if(i == VOYAGER_PSI) {
671                         /* Exception leg for modules with no EEPROM */
672                         printk("Module \"%s\"\n", cat_module_name(i));
673                         continue;
674                 }
675                                
676                 CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET));
677                 outb(VOYAGER_CAT_RUN, CAT_CMD);
678                 cat_disconnect(*modpp, (*modpp)->asic);
679                 if(cat_subread(*modpp, (*modpp)->asic,
680                                VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size),
681                                &eprom_size)) {
682                         printk("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n", i);
683                         outb(VOYAGER_CAT_END, CAT_CMD);
684                         continue;
685                 }
686                 if(eprom_size > sizeof(eprom_buf)) {
687                         printk("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x.  Need %d\n", i, eprom_size);
688                         outb(VOYAGER_CAT_END, CAT_CMD);
689                         continue;
690                 }
691                 outb(VOYAGER_CAT_END, CAT_CMD);
692                 outb(VOYAGER_CAT_RUN, CAT_CMD);
693                 CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i, eprom_size));
694                 if(cat_subread(*modpp, (*modpp)->asic, 0, 
695                                eprom_size, eprom_buf)) {
696                         outb(VOYAGER_CAT_END, CAT_CMD);
697                         continue;
698                 }
699                 outb(VOYAGER_CAT_END, CAT_CMD);
700                 printk("Module \"%s\", version 0x%x, tracer 0x%x, asics %d\n",
701                        cat_module_name(i), eprom_hdr->version_id,
702                        *((__u32 *)eprom_hdr->tracer),  eprom_hdr->num_asics);
703                 (*modpp)->ee_size = eprom_hdr->ee_size;
704                 (*modpp)->num_asics = eprom_hdr->num_asics;
705                 asicpp = &((*modpp)->asic);
706                 sp_offset = eprom_hdr->scan_path_offset;
707                 /* All we really care about are the Quad cards.  We
708                  * identify them because they are in a processor slot
709                  * and have only four asics */
710                 if((i < 0x10 || (i>=0x14 && i < 0x1c) || i>0x1f)) {
711                         modpp = &((*modpp)->next);
712                         continue;
713                 }
714                 /* Now we know it's in a processor slot, does it have
715                  * a quad baseboard submodule */
716                 outb(VOYAGER_CAT_RUN, CAT_CMD);
717                 cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODPRESENT,
718                          &num_submodules);
719                 /* lowest two bits, active low */
720                 num_submodules = ~(0xfc | num_submodules);
721                 CDEBUG(("VOYAGER CAT: %d submodules present\n", num_submodules));
722                 if(num_submodules == 0) {
723                         /* fill in the dyadic extended processors */
724                         __u8 cpu = i & 0x07;
725
726                         printk("Module \"%s\": Dyadic Processor Card\n",
727                                cat_module_name(i));
728                         voyager_extended_vic_processors |= (1<<cpu);
729                         cpu += 4;
730                         voyager_extended_vic_processors |= (1<<cpu);
731                         outb(VOYAGER_CAT_END, CAT_CMD);
732                         continue;
733                 }
734
735                 /* now we want to read the asics on the first submodule,
736                  * which should be the quad base board */
737
738                 cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, &val);
739                 CDEBUG(("cat_init: SUBMODSELECT value = 0x%x\n", val));
740                 val = (val & 0x7c) | VOYAGER_QUAD_BASEBOARD;
741                 cat_write(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, val);
742
743                 outb(VOYAGER_CAT_END, CAT_CMD);
744                          
745
746                 CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET));
747                 outb(VOYAGER_CAT_RUN, CAT_CMD);
748                 cat_disconnect(*modpp, (*modpp)->asic);
749                 if(cat_subread(*modpp, (*modpp)->asic,
750                                VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size),
751                                &eprom_size)) {
752                         printk("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n", i);
753                         outb(VOYAGER_CAT_END, CAT_CMD);
754                         continue;
755                 }
756                 if(eprom_size > sizeof(eprom_buf)) {
757                         printk("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x.  Need %d\n", i, eprom_size);
758                         outb(VOYAGER_CAT_END, CAT_CMD);
759                         continue;
760                 }
761                 outb(VOYAGER_CAT_END, CAT_CMD);
762                 outb(VOYAGER_CAT_RUN, CAT_CMD);
763                 CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i, eprom_size));
764                 if(cat_subread(*modpp, (*modpp)->asic, 0, 
765                                eprom_size, eprom_buf)) {
766                         outb(VOYAGER_CAT_END, CAT_CMD);
767                         continue;
768                 }
769                 outb(VOYAGER_CAT_END, CAT_CMD);
770                 /* Now do everything for the QBB submodule 1 */
771                 (*modpp)->ee_size = eprom_hdr->ee_size;
772                 (*modpp)->num_asics = eprom_hdr->num_asics;
773                 asicpp = &((*modpp)->asic);
774                 sp_offset = eprom_hdr->scan_path_offset;
775                 /* get rid of the dummy CAT asic and read the real one */
776                 kfree((*modpp)->asic);
777                 for(asic=0; asic < (*modpp)->num_asics; asic++) {
778                         int j;
779                         voyager_asic_t *asicp = *asicpp 
780                                 = kmalloc(sizeof(voyager_asic_t), GFP_KERNEL); /*&voyager_asic_storage[asic_count++];*/
781                         voyager_sp_table_t *sp_table;
782                         voyager_at_t *asic_table;
783                         voyager_jtt_t *jtag_table;
784
785                         if(asicp == NULL) {
786                                 printk("**WARNING** kmalloc failure in cat_init\n");
787                                 continue;
788                         }
789                         memset(asicp, 0, sizeof(voyager_asic_t));
790                         asicpp = &(asicp->next);
791                         asicp->asic_location = asic;
792                         sp_table = (voyager_sp_table_t *)(eprom_buf + sp_offset);
793                         asicp->asic_id = sp_table->asic_id;
794                         asic_table = (voyager_at_t *)(eprom_buf + sp_table->asic_data_offset);
795                         for(j=0; j<4; j++)
796                                 asicp->jtag_id[j] = asic_table->jtag_id[j];
797                         jtag_table = (voyager_jtt_t *)(eprom_buf + asic_table->jtag_offset);
798                         asicp->ireg_length = jtag_table->ireg_len;
799                         asicp->bit_location = (*modpp)->inst_bits;
800                         (*modpp)->inst_bits += asicp->ireg_length;
801                         if(asicp->ireg_length > (*modpp)->largest_reg)
802                                 (*modpp)->largest_reg = asicp->ireg_length;
803                         if (asicp->ireg_length < (*modpp)->smallest_reg ||
804                             (*modpp)->smallest_reg == 0)
805                                 (*modpp)->smallest_reg = asicp->ireg_length;
806                         CDEBUG(("asic 0x%x, ireg_length=%d, bit_location=%d\n",
807                                 asicp->asic_id, asicp->ireg_length,
808                                 asicp->bit_location));
809                         if(asicp->asic_id == VOYAGER_QUAD_QABC) {
810                                 CDEBUG(("VOYAGER CAT: QABC ASIC found\n"));
811                                 qabc_asic = asicp;
812                         }
813                         sp_offset += sizeof(voyager_sp_table_t);
814                 }
815                 CDEBUG(("Module inst_bits = %d, largest_reg = %d, smallest_reg=%d\n",
816                         (*modpp)->inst_bits, (*modpp)->largest_reg,
817                         (*modpp)->smallest_reg));
818                 /* OK, now we have the QUAD ASICs set up, use them.
819                  * we need to:
820                  *
821                  * 1. Find the Memory area for the Quad CPIs.
822                  * 2. Find the Extended VIC processor
823                  * 3. Configure a second extended VIC processor (This
824                  *    cannot be done for the 51xx.
825                  * */
826                 outb(VOYAGER_CAT_RUN, CAT_CMD);
827                 cat_connect(*modpp, (*modpp)->asic);
828                 CDEBUG(("CAT CONNECTED!!\n"));
829                 cat_subread(*modpp, qabc_asic, 0, sizeof(qabc_data), qabc_data);
830                 qic_addr = qabc_data[5] << 8;
831                 qic_addr = (qic_addr | qabc_data[6]) << 8;
832                 qic_addr = (qic_addr | qabc_data[7]) << 8;
833                 printk("Module \"%s\": Quad Processor Card; CPI 0x%lx, SET=0x%x\n",
834                        cat_module_name(i), qic_addr, qabc_data[8]);
835 #if 0                           /* plumbing fails---FIXME */
836                 if((qabc_data[8] & 0xf0) == 0) {
837                         /* FIXME: 32 way 8 CPU slot monster cannot be
838                          * plumbed this way---need to check for it */
839
840                         printk("Plumbing second Extended Quad Processor\n");
841                         /* second VIC line hardwired to Quad CPU 1 */
842                         qabc_data[8] |= 0x20;
843                         cat_subwrite(*modpp, qabc_asic, 8, 1, &qabc_data[8]);
844 #ifdef VOYAGER_CAT_DEBUG
845                         /* verify plumbing */
846                         cat_subread(*modpp, qabc_asic, 8, 1, &qabc_data[8]);
847                         if((qabc_data[8] & 0xf0) == 0) {
848                                 CDEBUG(("PLUMBING FAILED: 0x%x\n", qabc_data[8]));
849                         }
850 #endif
851                 }
852 #endif
853
854                 {
855                         struct resource *res = kmalloc(sizeof(struct resource),GFP_KERNEL);
856                         memset(res, 0, sizeof(struct resource));
857                         res->name = kmalloc(128, GFP_KERNEL);
858                         sprintf((char *)res->name, "Voyager %s Quad CPI", cat_module_name(i));
859                         res->start = qic_addr;
860                         res->end = qic_addr + 0x3ff;
861                         request_resource(&iomem_resource, res);
862                 }
863
864                 qic_addr = (unsigned long)ioremap(qic_addr, 0x400);
865                                 
866                 for(j = 0; j < 4; j++) {
867                         __u8 cpu;
868
869                         if(voyager_8slot) {
870                                 /* 8 slot has a different mapping,
871                                  * each slot has only one vic line, so
872                                  * 1 cpu in each slot must be < 8 */
873                                 cpu = (i & 0x07) + j*8;
874                         } else {
875                                 cpu = (i & 0x03) + j*4;
876                         }
877                         if( (qabc_data[8] & (1<<j))) {
878                                 voyager_extended_vic_processors |= (1<<cpu);
879                         }
880                         if(qabc_data[8] & (1<<(j+4)) ) {
881                                 /* Second SET register plumbed: Quad
882                                  * card has two VIC connected CPUs.
883                                  * Secondary cannot be booted as a VIC
884                                  * CPU */
885                                 voyager_extended_vic_processors |= (1<<cpu);
886                                 voyager_allowed_boot_processors &= (~(1<<cpu));
887                         }
888
889                         voyager_quad_processors |= (1<<cpu);
890                         voyager_quad_cpi_addr[cpu] = (struct voyager_qic_cpi *)
891                                 (qic_addr+(j<<8));
892                         CDEBUG(("CPU%d: CPI address 0x%lx\n", cpu,
893                                 (unsigned long)voyager_quad_cpi_addr[cpu]));
894                 }
895                 outb(VOYAGER_CAT_END, CAT_CMD);
896
897                 
898                 
899                 *asicpp = NULL;
900                 modpp = &((*modpp)->next);
901         }
902         *modpp = NULL;
903         printk("CAT Bus Initialisation finished: extended procs 0x%x, quad procs 0x%x, allowed vic boot = 0x%x\n", voyager_extended_vic_processors, voyager_quad_processors, voyager_allowed_boot_processors);
904         request_resource(&ioport_resource, &vic_res);
905         if(voyager_quad_processors)
906                 request_resource(&ioport_resource, &qic_res);
907         /* set up the front power switch */
908 }
909
910 int
911 voyager_cat_readb(__u8 module, __u8 asic, int reg)
912 {
913         return 0;
914 }
915
916 static int
917 cat_disconnect(voyager_module_t *modp, voyager_asic_t *asicp) 
918 {
919         __u8 val;
920         int err = 0;
921
922         if(!modp->scan_path_connected)
923                 return 0;
924         if(asicp->asic_id != VOYAGER_CAT_ID) {
925                 CDEBUG(("cat_disconnect: ASIC is not CAT\n"));
926                 return 1;
927         }
928         err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val);
929         if(err) {
930                 CDEBUG(("cat_disconnect: failed to read SCANPATH\n"));
931                 return err;
932         }
933         val &= VOYAGER_DISCONNECT_ASIC;
934         err = cat_write(modp, asicp, VOYAGER_SCANPATH, val);
935         if(err) {
936                 CDEBUG(("cat_disconnect: failed to write SCANPATH\n"));
937                 return err;
938         }
939         outb(VOYAGER_CAT_END, CAT_CMD);
940         outb(VOYAGER_CAT_RUN, CAT_CMD);
941         modp->scan_path_connected = 0;
942
943         return 0;
944 }
945
946 static int
947 cat_connect(voyager_module_t *modp, voyager_asic_t *asicp) 
948 {
949         __u8 val;
950         int err = 0;
951
952         if(modp->scan_path_connected)
953                 return 0;
954         if(asicp->asic_id != VOYAGER_CAT_ID) {
955                 CDEBUG(("cat_connect: ASIC is not CAT\n"));
956                 return 1;
957         }
958
959         err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val);
960         if(err) {
961                 CDEBUG(("cat_connect: failed to read SCANPATH\n"));
962                 return err;
963         }
964         val |= VOYAGER_CONNECT_ASIC;
965         err = cat_write(modp, asicp, VOYAGER_SCANPATH, val);
966         if(err) {
967                 CDEBUG(("cat_connect: failed to write SCANPATH\n"));
968                 return err;
969         }
970         outb(VOYAGER_CAT_END, CAT_CMD);
971         outb(VOYAGER_CAT_RUN, CAT_CMD);
972         modp->scan_path_connected = 1;
973
974         return 0;
975 }
976
977 void
978 voyager_cat_power_off(void)
979 {
980         /* Power the machine off by writing to the PSI over the CAT
981          * bus */
982         __u8 data;
983         voyager_module_t psi = { 0 };
984         voyager_asic_t psi_asic = { 0 };
985
986         psi.asic = &psi_asic;
987         psi.asic->asic_id = VOYAGER_CAT_ID;
988         psi.asic->subaddr = VOYAGER_SUBADDR_HI;
989         psi.module_addr = VOYAGER_PSI;
990         psi.scan_path_connected = 0;
991
992         outb(VOYAGER_CAT_END, CAT_CMD);
993         /* Connect the PSI to the CAT Bus */
994         outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
995         outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
996         outb(VOYAGER_CAT_RUN, CAT_CMD);
997         cat_disconnect(&psi, &psi_asic);
998         /* Read the status */
999         cat_subread(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
1000         outb(VOYAGER_CAT_END, CAT_CMD);
1001         CDEBUG(("PSI STATUS 0x%x\n", data));
1002         /* These two writes are power off prep and perform */
1003         data = PSI_CLEAR;
1004         outb(VOYAGER_CAT_RUN, CAT_CMD);
1005         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
1006         outb(VOYAGER_CAT_END, CAT_CMD);
1007         data = PSI_POWER_DOWN;
1008         outb(VOYAGER_CAT_RUN, CAT_CMD);
1009         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
1010         outb(VOYAGER_CAT_END, CAT_CMD);
1011 }
1012
1013 struct voyager_status voyager_status = { 0 };
1014
1015 void
1016 voyager_cat_psi(__u8 cmd, __u16 reg, __u8 *data)
1017 {
1018         voyager_module_t psi = { 0 };
1019         voyager_asic_t psi_asic = { 0 };
1020
1021         psi.asic = &psi_asic;
1022         psi.asic->asic_id = VOYAGER_CAT_ID;
1023         psi.asic->subaddr = VOYAGER_SUBADDR_HI;
1024         psi.module_addr = VOYAGER_PSI;
1025         psi.scan_path_connected = 0;
1026
1027         outb(VOYAGER_CAT_END, CAT_CMD);
1028         /* Connect the PSI to the CAT Bus */
1029         outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
1030         outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
1031         outb(VOYAGER_CAT_RUN, CAT_CMD);
1032         cat_disconnect(&psi, &psi_asic);
1033         switch(cmd) {
1034         case VOYAGER_PSI_READ:
1035                 cat_read(&psi, &psi_asic, reg, data);
1036                 break;
1037         case VOYAGER_PSI_WRITE:
1038                 cat_write(&psi, &psi_asic, reg, *data);
1039                 break;
1040         case VOYAGER_PSI_SUBREAD:
1041                 cat_subread(&psi, &psi_asic, reg, 1, data);
1042                 break;
1043         case VOYAGER_PSI_SUBWRITE:
1044                 cat_subwrite(&psi, &psi_asic, reg, 1, data);
1045                 break;
1046         default:
1047                 printk(KERN_ERR "Voyager PSI, unrecognised command %d\n", cmd);
1048                 break;
1049         }
1050         outb(VOYAGER_CAT_END, CAT_CMD);
1051 }
1052
1053 void
1054 voyager_cat_do_common_interrupt(void)
1055 {
1056         /* This is caused either by a memory parity error or something
1057          * in the PSI */
1058         __u8 data;
1059         voyager_module_t psi = { 0 };
1060         voyager_asic_t psi_asic = { 0 };
1061         struct voyager_psi psi_reg;
1062         int i;
1063  re_read:
1064         psi.asic = &psi_asic;
1065         psi.asic->asic_id = VOYAGER_CAT_ID;
1066         psi.asic->subaddr = VOYAGER_SUBADDR_HI;
1067         psi.module_addr = VOYAGER_PSI;
1068         psi.scan_path_connected = 0;
1069
1070         outb(VOYAGER_CAT_END, CAT_CMD);
1071         /* Connect the PSI to the CAT Bus */
1072         outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
1073         outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
1074         outb(VOYAGER_CAT_RUN, CAT_CMD);
1075         cat_disconnect(&psi, &psi_asic);
1076         /* Read the status.  NOTE: Need to read *all* the PSI regs here
1077          * otherwise the cmn int will be reasserted */
1078         for(i = 0; i < sizeof(psi_reg.regs); i++) {
1079                 cat_read(&psi, &psi_asic, i, &((__u8 *)&psi_reg.regs)[i]);
1080         }
1081         outb(VOYAGER_CAT_END, CAT_CMD);
1082         if((psi_reg.regs.checkbit & 0x02) == 0) {
1083                 psi_reg.regs.checkbit |= 0x02;
1084                 cat_write(&psi, &psi_asic, 5, psi_reg.regs.checkbit);
1085                 printk("VOYAGER RE-READ PSI\n");
1086                 goto re_read;
1087         }
1088         outb(VOYAGER_CAT_RUN, CAT_CMD);
1089         for(i = 0; i < sizeof(psi_reg.subregs); i++) {
1090                 /* This looks strange, but the PSI doesn't do auto increment
1091                  * correctly */
1092                 cat_subread(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG + i, 
1093                             1, &((__u8 *)&psi_reg.subregs)[i]); 
1094         }
1095         outb(VOYAGER_CAT_END, CAT_CMD);
1096 #ifdef VOYAGER_CAT_DEBUG
1097         printk("VOYAGER PSI: ");
1098         for(i=0; i<sizeof(psi_reg.regs); i++)
1099                 printk("%02x ", ((__u8 *)&psi_reg.regs)[i]);
1100         printk("\n           ");
1101         for(i=0; i<sizeof(psi_reg.subregs); i++)
1102                 printk("%02x ", ((__u8 *)&psi_reg.subregs)[i]);
1103         printk("\n");
1104 #endif
1105         if(psi_reg.regs.intstatus & PSI_MON) {
1106                 /* switch off or power fail */
1107
1108                 if(psi_reg.subregs.supply & PSI_SWITCH_OFF) {
1109                         if(voyager_status.switch_off) {
1110                                 printk(KERN_ERR "Voyager front panel switch turned off again---Immediate power off!\n");
1111                                 voyager_cat_power_off();
1112                                 /* not reached */
1113                         } else {
1114                                 printk(KERN_ERR "Voyager front panel switch turned off\n");
1115                                 voyager_status.switch_off = 1;
1116                                 voyager_status.request_from_kernel = 1;
1117                                 up(&kvoyagerd_sem);
1118                         }
1119                         /* Tell the hardware we're taking care of the
1120                          * shutdown, otherwise it will power the box off
1121                          * within 3 seconds of the switch being pressed and,
1122                          * which is much more important to us, continue to 
1123                          * assert the common interrupt */
1124                         data = PSI_CLR_SWITCH_OFF;
1125                         outb(VOYAGER_CAT_RUN, CAT_CMD);
1126                         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG,
1127                                      1, &data);
1128                         outb(VOYAGER_CAT_END, CAT_CMD);
1129                 } else {
1130
1131                         VDEBUG(("Voyager ac fail reg 0x%x\n",
1132                                 psi_reg.subregs.ACfail));
1133                         if((psi_reg.subregs.ACfail & AC_FAIL_STAT_CHANGE) == 0) {
1134                                 /* No further update */
1135                                 return;
1136                         }
1137 #if 0
1138                         /* Don't bother trying to find out who failed.
1139                          * FIXME: This probably makes the code incorrect on
1140                          * anything other than a 345x */
1141                         for(i=0; i< 5; i++) {
1142                                 if( psi_reg.subregs.ACfail &(1<<i)) {
1143                                         break;
1144                                 }
1145                         }
1146                         printk(KERN_NOTICE "AC FAIL IN SUPPLY %d\n", i);
1147 #endif
1148                         /* DON'T do this: it shuts down the AC PSI 
1149                         outb(VOYAGER_CAT_RUN, CAT_CMD);
1150                         data = PSI_MASK_MASK | i;
1151                         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_MASK,
1152                                      1, &data);
1153                         outb(VOYAGER_CAT_END, CAT_CMD);
1154                         */
1155                         printk(KERN_ERR "Voyager AC power failure\n");
1156                         outb(VOYAGER_CAT_RUN, CAT_CMD);
1157                         data = PSI_COLD_START;
1158                         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG,
1159                                      1, &data);
1160                         outb(VOYAGER_CAT_END, CAT_CMD);
1161                         voyager_status.power_fail = 1;
1162                         voyager_status.request_from_kernel = 1;
1163                         up(&kvoyagerd_sem);
1164                 }
1165                 
1166                 
1167         } else if(psi_reg.regs.intstatus & PSI_FAULT) {
1168                 /* Major fault! */
1169                 printk(KERN_ERR "Voyager PSI Detected major fault, immediate power off!\n");
1170                 voyager_cat_power_off();
1171                 /* not reached */
1172         } else if(psi_reg.regs.intstatus & (PSI_DC_FAIL | PSI_ALARM
1173                                             | PSI_CURRENT | PSI_DVM
1174                                             | PSI_PSCFAULT | PSI_STAT_CHG)) {
1175                 /* other psi fault */
1176
1177                 printk(KERN_WARNING "Voyager PSI status 0x%x\n", data);
1178                 /* clear the PSI fault */
1179                 outb(VOYAGER_CAT_RUN, CAT_CMD);
1180                 cat_write(&psi, &psi_asic, VOYAGER_PSI_STATUS_REG, 0);
1181                 outb(VOYAGER_CAT_END, CAT_CMD);
1182         }
1183 }