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 #define BITS_PER_BYTE 8
 124 static void
 125 cat_pack(__u8 *msg, const __u16 start_bit, __u8 *data, const __u16 num_bits)
 126 {
 127         /* compute initial shift needed */
 128         const __u16 offset = start_bit % BITS_PER_BYTE;
 129         __u16 len = num_bits / BITS_PER_BYTE;
 130         __u16 byte = start_bit / BITS_PER_BYTE;
 131         __u16 residue = (num_bits % BITS_PER_BYTE) + offset;
 132         int i;
 133
 134         /* adjust if we have more than a byte of residue */
 135         if(residue >= BITS_PER_BYTE) {
 136                 residue -= BITS_PER_BYTE;
 137                 len++;
 138         }
 139
 140         /* clear out the bits.  We assume here that if len==0 then
 141          * residue >= offset.  This is always true for the catbus
 142          * operations */
 143         msg[byte] &= 0xff << (BITS_PER_BYTE - offset);
 144         msg[byte++] |= data[0] >> offset;
 145         if(len == 0)
 146                 return;
 147         for(i = 1; i < len; i++)
 148                 msg[byte++] = (data[i-1] << (BITS_PER_BYTE - offset))
 149                         | (data[i] >> offset);
 150         if(residue != 0) {
 151                 __u8 mask = 0xff >> residue;
 152                 __u8 last_byte = data[i-1] << (BITS_PER_BYTE - offset)
 153                         | (data[i] >> offset);
 154
 155                 last_byte &= ~mask;
 156                 msg[byte] &= mask;
 157                 msg[byte] |= last_byte;
 158         }
 159         return;
 160 }
 161 /* unpack the data again (same arguments as cat_pack()). data buffer
 162  * must be zero populated.
 163  *
 164  * Function: given a message string move to start_bit and copy num_bits into
 165  * data (starting at bit 0 in data).
 166  */
 167 static void
 168 cat_unpack(__u8 *msg, const __u16 start_bit, __u8 *data, const __u16 num_bits)
 169 {
 170         /* compute initial shift needed */
 171         const __u16 offset = start_bit % BITS_PER_BYTE;
 172         __u16 len = num_bits / BITS_PER_BYTE;
 173         const __u8 last_bits = num_bits % BITS_PER_BYTE;
 174         __u16 byte = start_bit / BITS_PER_BYTE;
 175         int i;
 176
 177         if(last_bits != 0)
 178                 len++;
 179
 180         /* special case: want < 8 bits from msg and we can get it from
 181          * a single byte of the msg */
 182         if(len == 0 && BITS_PER_BYTE - offset >= num_bits) {
 183                 data[0] = msg[byte] << offset;
 184                 data[0] &= 0xff >> (BITS_PER_BYTE - num_bits);
 185                 return;
 186         }
 187         for(i = 0; i < len; i++) {
 188                 /* this annoying if has to be done just in case a read of
 189                  * msg one beyond the array causes a panic */
 190                 if(offset != 0) {
 191                         data[i] = msg[byte++] << offset;
 192                         data[i] |= msg[byte] >> (BITS_PER_BYTE - offset);
 193                 }
 194                 else {
 195                         data[i] = msg[byte++];
 196                 }
 197         }
 198         /* do we need to truncate the final byte */
 199         if(last_bits != 0) {
 200                 data[i-1] &= 0xff << (BITS_PER_BYTE - last_bits);
 201         }
 202         return;
 203 }
 204
 205 static void
 206 cat_build_header(__u8 *header, const __u16 len, const __u16 smallest_reg_bits,
 207                  const __u16 longest_reg_bits)
 208 {
 209         int i;
 210         __u16 start_bit = (smallest_reg_bits - 1) % BITS_PER_BYTE;
 211         __u8 *last_byte = &header[len - 1];
 212
 213         if(start_bit == 0)
 214                 start_bit = 1;  /* must have at least one bit in the hdr */
 215
 216         for(i=0; i < len; i++)
 217                 header[i] = 0;
 218
 219         for(i = start_bit; i > 0; i--)
 220                 *last_byte = ((*last_byte) << 1) + 1;
 221
 222 }
 223
 224 static int
 225 cat_sendinst(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg, __u8 op)
 226 {
 227         __u8 parity, inst, inst_buf[4] = { 0 };
 228         __u8 iseq[VOYAGER_MAX_SCAN_PATH], hseq[VOYAGER_MAX_REG_SIZE];
 229         __u16 ibytes, hbytes, padbits;
 230         int i;
 231
 232         /*
 233          * Parity is the parity of the register number + 1 (READ_REGISTER
 234          * and WRITE_REGISTER always add '1' to the number of bits == 1)
 235          */
 236         parity = (__u8)(1 + (reg & 0x01) +
 237                  ((__u8)(reg & 0x02) >> 1) +
 238                  ((__u8)(reg & 0x04) >> 2) +
 239                  ((__u8)(reg & 0x08) >> 3)) % 2;
 240
 241         inst = ((parity << 7) | (reg << 2) | op);
 242
 243         outb(VOYAGER_CAT_IRCYC, CAT_CMD);
 244         if(!modp->scan_path_connected) {
 245                 if(asicp->asic_id != VOYAGER_CAT_ID) {
 246                         printk("**WARNING***: cat_sendinst has disconnected scan path not to CAT asic\n");
 247                         return 1;
 248                 }
 249                 outb(VOYAGER_CAT_HEADER, CAT_DATA);
 250                 outb(inst, CAT_DATA);
 251                 if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
 252                         CDEBUG(("VOYAGER CAT: cat_sendinst failed to get CAT_HEADER\n"));
 253                         return 1;
 254                 }
 255                 return 0;
 256         }
 257         ibytes = modp->inst_bits / BITS_PER_BYTE;
 258         if((padbits = modp->inst_bits % BITS_PER_BYTE) != 0) {
 259                 padbits = BITS_PER_BYTE - padbits;
 260                 ibytes++;
 261         }
 262         hbytes = modp->largest_reg / BITS_PER_BYTE;
 263         if(modp->largest_reg % BITS_PER_BYTE)
 264                 hbytes++;
 265         CDEBUG(("cat_sendinst: ibytes=%d, hbytes=%d\n", ibytes, hbytes));
 266         /* initialise the instruction sequence to 0xff */
 267         for(i=0; i < ibytes + hbytes; i++)
 268                 iseq[i] = 0xff;
 269         cat_build_header(hseq, hbytes, modp->smallest_reg, modp->largest_reg);
 270         cat_pack(iseq, modp->inst_bits, hseq, hbytes * BITS_PER_BYTE);
 271         inst_buf[0] = inst;
 272         inst_buf[1] = 0xFF >> (modp->largest_reg % BITS_PER_BYTE);
 273         cat_pack(iseq, asicp->bit_location, inst_buf, asicp->ireg_length);
 274 #ifdef VOYAGER_CAT_DEBUG
 275         printk("ins = 0x%x, iseq: ", inst);
 276         for(i=0; i< ibytes + hbytes; i++)
 277                 printk("0x%x ", iseq[i]);
 278         printk("\n");
 279 #endif
 280         if(cat_shiftout(iseq, ibytes, hbytes, padbits)) {
 281                 CDEBUG(("VOYAGER CAT: cat_sendinst: cat_shiftout failed\n"));
 282                 return 1;
 283         }
 284         CDEBUG(("CAT SHIFTOUT DONE\n"));
 285         return 0;
 286 }
 287
 288 static int
 289 cat_getdata(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
 290             __u8 *value)
 291 {
 292         if(!modp->scan_path_connected) {
 293                 if(asicp->asic_id != VOYAGER_CAT_ID) {
 294                         CDEBUG(("VOYAGER CAT: ERROR: cat_getdata to CAT asic with scan path connected\n"));
 295                         return 1;
 296                 }
 297                 if(reg > VOYAGER_SUBADDRHI)
 298                         outb(VOYAGER_CAT_RUN, CAT_CMD);
 299                 outb(VOYAGER_CAT_DRCYC, CAT_CMD);
 300                 outb(VOYAGER_CAT_HEADER, CAT_DATA);
 301                 *value = inb(CAT_DATA);
 302                 outb(0xAA, CAT_DATA);
 303                 if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
 304                         CDEBUG(("cat_getdata: failed to get VOYAGER_CAT_HEADER\n"));
 305                         return 1;
 306                 }
 307                 return 0;
 308         }
 309         else {
 310                 __u16 sbits = modp->num_asics -1 + asicp->ireg_length;
 311                 __u16 sbytes = sbits / BITS_PER_BYTE;
 312                 __u16 tbytes;
 313                 __u8 string[VOYAGER_MAX_SCAN_PATH], trailer[VOYAGER_MAX_REG_SIZE];
 314                 __u8 padbits;
 315                 int i;
 316
 317                 outb(VOYAGER_CAT_DRCYC, CAT_CMD);
 318
 319                 if((padbits = sbits % BITS_PER_BYTE) != 0) {
 320                         padbits = BITS_PER_BYTE - padbits;
 321                         sbytes++;
 322                 }
 323                 tbytes = asicp->ireg_length / BITS_PER_BYTE;
 324                 if(asicp->ireg_length % BITS_PER_BYTE)
 325                         tbytes++;
 326                 CDEBUG(("cat_getdata: tbytes = %d, sbytes = %d, padbits = %d\n",
 327                         tbytes, sbytes, padbits));
 328                 cat_build_header(trailer, tbytes, 1, asicp->ireg_length);
 329
 330
 331                 for(i = tbytes - 1; i >= 0; i--) {
 332                         outb(trailer[i], CAT_DATA);
 333                         string[sbytes + i] = inb(CAT_DATA);
 334                 }
 335
 336                 for(i = sbytes - 1; i >= 0; i--) {
 337                         outb(0xaa, CAT_DATA);
 338                         string[i] = inb(CAT_DATA);
 339                 }
 340                 *value = 0;
 341                 cat_unpack(string, padbits + (tbytes * BITS_PER_BYTE) + asicp->asic_location, value, asicp->ireg_length);
 342 #ifdef VOYAGER_CAT_DEBUG
 343                 printk("value=0x%x, string: ", *value);
 344                 for(i=0; i< tbytes+sbytes; i++)
 345                         printk("0x%x ", string[i]);
 346                 printk("\n");
 347 #endif
 348
 349                 /* sanity check the rest of the return */
 350                 for(i=0; i < tbytes; i++) {
 351                         __u8 input = 0;
 352
 353                         cat_unpack(string, padbits + (i * BITS_PER_BYTE), &input, BITS_PER_BYTE);
 354                         if(trailer[i] != input) {
 355                                 CDEBUG(("cat_getdata: failed to sanity check rest of ret(%d) 0x%x != 0x%x\n", i, input, trailer[i]));
 356                                 return 1;
 357                         }
 358                 }
 359                 CDEBUG(("cat_getdata DONE\n"));
 360                 return 0;
 361         }
 362 }
 363
 364 static int
 365 cat_shiftout(__u8 *data, __u16 data_bytes, __u16 header_bytes, __u8 pad_bits)
 366 {
 367         int i;
 368
 369         for(i = data_bytes + header_bytes - 1; i >= header_bytes; i--)
 370                 outb(data[i], CAT_DATA);
 371
 372         for(i = header_bytes - 1; i >= 0; i--) {
 373                 __u8 header = 0;
 374                 __u8 input;
 375
 376                 outb(data[i], CAT_DATA);
 377                 input = inb(CAT_DATA);
 378                 CDEBUG(("cat_shiftout: returned 0x%x\n", input));
 379                 cat_unpack(data, ((data_bytes + i) * BITS_PER_BYTE) - pad_bits,
 380                            &header, BITS_PER_BYTE);
 381                 if(input != header) {
 382                         CDEBUG(("VOYAGER CAT: cat_shiftout failed to return header 0x%x != 0x%x\n", input, header));
 383                         return 1;
 384                 }
 385         }
 386         return 0;
 387 }
 388
 389 static int
 390 cat_senddata(voyager_module_t *modp, voyager_asic_t *asicp,
 391              __u8 reg, __u8 value)
 392 {
 393         outb(VOYAGER_CAT_DRCYC, CAT_CMD);
 394         if(!modp->scan_path_connected) {
 395                 if(asicp->asic_id != VOYAGER_CAT_ID) {
 396                         CDEBUG(("VOYAGER CAT: ERROR: scan path disconnected when asic != CAT\n"));
 397                         return 1;
 398                 }
 399                 outb(VOYAGER_CAT_HEADER, CAT_DATA);
 400                 outb(value, CAT_DATA);
 401                 if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
 402                         CDEBUG(("cat_senddata: failed to get correct header response to sent data\n"));
 403                         return 1;
 404                 }
 405                 if(reg > VOYAGER_SUBADDRHI) {
 406                         outb(VOYAGER_CAT_RUN, CAT_CMD);
 407                         outb(VOYAGER_CAT_END, CAT_CMD);
 408                         outb(VOYAGER_CAT_RUN, CAT_CMD);
 409                 }
 410
 411                 return 0;
 412         }
 413         else {
 414                 __u16 hbytes = asicp->ireg_length / BITS_PER_BYTE;
 415                 __u16 dbytes = (modp->num_asics - 1 + asicp->ireg_length)/BITS_PER_BYTE;
 416                 __u8 padbits, dseq[VOYAGER_MAX_SCAN_PATH],
 417                         hseq[VOYAGER_MAX_REG_SIZE];
 418                 int i;
 419
 420                 if((padbits = (modp->num_asics - 1
 421                                + asicp->ireg_length) % BITS_PER_BYTE) != 0) {
 422                         padbits = BITS_PER_BYTE - padbits;
 423                         dbytes++;
 424                 }
 425                 if(asicp->ireg_length % BITS_PER_BYTE)
 426                         hbytes++;
 427
 428                 cat_build_header(hseq, hbytes, 1, asicp->ireg_length);
 429
 430                 for(i = 0; i < dbytes + hbytes; i++)
 431                         dseq[i] = 0xff;
 432                 CDEBUG(("cat_senddata: dbytes=%d, hbytes=%d, padbits=%d\n",
 433                         dbytes, hbytes, padbits));
 434                 cat_pack(dseq, modp->num_asics - 1 + asicp->ireg_length,
 435                          hseq, hbytes * BITS_PER_BYTE);
 436                 cat_pack(dseq, asicp->asic_location, &value,
 437                          asicp->ireg_length);
 438 #ifdef VOYAGER_CAT_DEBUG
 439                 printk("dseq ");
 440                 for(i=0; i<hbytes+dbytes; i++) {
 441                         printk("0x%x ", dseq[i]);
 442                 }
 443                 printk("\n");
 444 #endif
 445                 return cat_shiftout(dseq, dbytes, hbytes, padbits);
 446         }
 447 }
 448
 449 static int
 450 cat_write(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
 451          __u8 value)
 452 {
 453         if(cat_sendinst(modp, asicp, reg, VOYAGER_WRITE_CONFIG))
 454                 return 1;
 455         return cat_senddata(modp, asicp, reg, value);
 456 }
 457
 458 static int
 459 cat_read(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
 460          __u8 *value)
 461 {
 462         if(cat_sendinst(modp, asicp, reg, VOYAGER_READ_CONFIG))
 463                 return 1;
 464         return cat_getdata(modp, asicp, reg, value);
 465 }
 466
 467 static int
 468 cat_subaddrsetup(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
 469                  __u16 len)
 470 {
 471         __u8 val;
 472
 473         if(len > 1) {
 474                 /* set auto increment */
 475                 __u8 newval;
 476
 477                 if(cat_read(modp, asicp, VOYAGER_AUTO_INC_REG, &val)) {
 478                         CDEBUG(("cat_subaddrsetup: read of VOYAGER_AUTO_INC_REG failed\n"));
 479                         return 1;
 480                 }
 481                 CDEBUG(("cat_subaddrsetup: VOYAGER_AUTO_INC_REG = 0x%x\n", val));
 482                 newval = val | VOYAGER_AUTO_INC;
 483                 if(newval != val) {
 484                         if(cat_write(modp, asicp, VOYAGER_AUTO_INC_REG, val)) {
 485                                 CDEBUG(("cat_subaddrsetup: write to VOYAGER_AUTO_INC_REG failed\n"));
 486                                 return 1;
 487                         }
 488                 }
 489         }
 490         if(cat_write(modp, asicp, VOYAGER_SUBADDRLO, (__u8)(offset &0xff))) {
 491                 CDEBUG(("cat_subaddrsetup: write to SUBADDRLO failed\n"));
 492                 return 1;
 493         }
 494         if(asicp->subaddr > VOYAGER_SUBADDR_LO) {
 495                 if(cat_write(modp, asicp, VOYAGER_SUBADDRHI, (__u8)(offset >> 8))) {
 496                         CDEBUG(("cat_subaddrsetup: write to SUBADDRHI failed\n"));
 497                         return 1;
 498                 }
 499                 cat_read(modp, asicp, VOYAGER_SUBADDRHI, &val);
 500                 CDEBUG(("cat_subaddrsetup: offset = %d, hi = %d\n", offset, val));
 501         }
 502         cat_read(modp, asicp, VOYAGER_SUBADDRLO, &val);
 503         CDEBUG(("cat_subaddrsetup: offset = %d, lo = %d\n", offset, val));
 504         return 0;
 505 }
 506
 507 static int
 508 cat_subwrite(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
 509             __u16 len, void *buf)
 510 {
 511         int i, retval;
 512
 513         /* FIXME: need special actions for VOYAGER_CAT_ID here */
 514         if(asicp->asic_id == VOYAGER_CAT_ID) {
 515                 CDEBUG(("cat_subwrite: ATTEMPT TO WRITE TO CAT ASIC\n"));
 516                 /* FIXME -- This is supposed to be handled better
 517                  * There is a problem writing to the cat asic in the
 518                  * PSI.  The 30us delay seems to work, though */
 519                 udelay(30);
 520         }
 521
 522         if((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) {
 523                 printk("cat_subwrite: cat_subaddrsetup FAILED\n");
 524                 return retval;
 525         }
 526
 527         if(cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_WRITE_CONFIG)) {
 528                 printk("cat_subwrite: cat_sendinst FAILED\n");
 529                 return 1;
 530         }
 531         for(i = 0; i < len; i++) {
 532                 if(cat_senddata(modp, asicp, 0xFF, ((__u8 *)buf)[i])) {
 533                         printk("cat_subwrite: cat_sendata element at %d FAILED\n", i);
 534                         return 1;
 535                 }
 536         }
 537         return 0;
 538 }
 539 static int
 540 cat_subread(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
 541             __u16 len, void *buf)
 542 {
 543         int i, retval;
 544
 545         if((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) {
 546                 CDEBUG(("cat_subread: cat_subaddrsetup FAILED\n"));
 547                 return retval;
 548         }
 549
 550         if(cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_READ_CONFIG)) {
 551                 CDEBUG(("cat_subread: cat_sendinst failed\n"));
 552                 return 1;
 553         }
 554         for(i = 0; i < len; i++) {
 555                 if(cat_getdata(modp, asicp, 0xFF,
 556                                &((__u8 *)buf)[i])) {
 557                         CDEBUG(("cat_subread: cat_getdata element %d failed\n", i));
 558                         return 1;
 559                 }
 560         }
 561         return 0;
 562 }
 563
 564
 565 /* buffer for storing EPROM data read in during initialisation */
 566 static __initdata __u8 eprom_buf[0xFFFF];
 567 static voyager_module_t *voyager_initial_module;
 568
 569 /* Initialise the cat bus components.  We assume this is called by the
 570  * boot cpu *after* all memory initialisation has been done (so we can
 571  * use kmalloc) but before smp initialisation, so we can probe the SMP
 572  * configuration and pick up necessary information.  */
 573 void
 574 voyager_cat_init(void)
 575 {
 576         voyager_module_t **modpp = &voyager_initial_module;
 577         voyager_asic_t **asicpp;
 578         voyager_asic_t *qabc_asic = NULL;
 579         int i, j;
 580         unsigned long qic_addr = 0;
 581         __u8 qabc_data[0x20];
 582         __u8 num_submodules, val;
 583         voyager_eprom_hdr_t *eprom_hdr = (voyager_eprom_hdr_t *)&eprom_buf[0];
 584
 585         __u8 cmos[4];
 586         unsigned long addr;
 587
 588         /* initiallise the SUS mailbox */
 589         for(i=0; i<sizeof(cmos); i++)
 590                 cmos[i] = voyager_extended_cmos_read(VOYAGER_DUMP_LOCATION + i);
 591         addr = *(unsigned long *)cmos;
 592         if((addr & 0xff000000) != 0xff000000) {
 593                 printk(KERN_ERR "Voyager failed to get SUS mailbox (addr = 0x%lx\n", addr);
 594         } else {
 595                 static struct resource res;
 596
 597                 res.name = "voyager SUS";
 598                 res.start = addr;
 599                 res.end = addr+0x3ff;
 600
 601                 request_resource(&iomem_resource, &res);
 602                 voyager_SUS = (struct voyager_SUS *)
 603                         ioremap(addr, 0x400);
 604                 printk(KERN_NOTICE "Voyager SUS mailbox version 0x%x\n",
 605                        voyager_SUS->SUS_version);
 606                 voyager_SUS->kernel_version = VOYAGER_MAILBOX_VERSION;
 607                 voyager_SUS->kernel_flags = VOYAGER_OS_HAS_SYSINT;
 608         }
 609
 610         /* clear the processor counts */
 611         voyager_extended_vic_processors = 0;
 612         voyager_quad_processors = 0;
 613
 614
 615
 616         printk("VOYAGER: beginning CAT bus probe\n");
 617         /* set up the SuperSet Port Block which tells us where the
 618          * CAT communication port is */
 619         sspb = inb(VOYAGER_SSPB_RELOCATION_PORT) * 0x100;
 620         VDEBUG(("VOYAGER DEBUG: sspb = 0x%x\n", sspb));
 621
 622         /* now find out if were 8 slot or normal */
 623         if((inb(VIC_PROC_WHO_AM_I) & EIGHT_SLOT_IDENTIFIER)
 624            == EIGHT_SLOT_IDENTIFIER) {
 625                 voyager_8slot = 1;
 626                 printk(KERN_NOTICE "Voyager: Eight slot 51xx configuration detected\n");
 627         }
 628
 629         for(i = VOYAGER_MIN_MODULE;
 630             i <= VOYAGER_MAX_MODULE; i++) {
 631                 __u8 input;
 632                 int asic;
 633                 __u16 eprom_size;
 634                 __u16 sp_offset;
 635
 636                 outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
 637                 outb(i, VOYAGER_CAT_CONFIG_PORT);
 638
 639                 /* check the presence of the module */
 640                 outb(VOYAGER_CAT_RUN, CAT_CMD);
 641                 outb(VOYAGER_CAT_IRCYC, CAT_CMD);
 642                 outb(VOYAGER_CAT_HEADER, CAT_DATA);
 643                 /* stream series of alternating 1's and 0's to stimulate
 644                  * response */
 645                 outb(0xAA, CAT_DATA);
 646                 input = inb(CAT_DATA);
 647                 outb(VOYAGER_CAT_END, CAT_CMD);
 648                 if(input != VOYAGER_CAT_HEADER) {
 649                         continue;
 650                 }
 651                 CDEBUG(("VOYAGER DEBUG: found module id 0x%x, %s\n", i,
 652                         cat_module_name(i)));
 653                 *modpp = kmalloc(sizeof(voyager_module_t), GFP_KERNEL); /*&voyager_module_storage[cat_count++];*/
 654                 if(*modpp == NULL) {
 655                         printk("**WARNING** kmalloc failure in cat_init\n");
 656                         continue;
 657                 }
 658                 memset(*modpp, 0, sizeof(voyager_module_t));
 659                 /* need temporary asic for cat_subread.  It will be
 660                  * filled in correctly later */
 661                 (*modpp)->asic = kmalloc(sizeof(voyager_asic_t), GFP_KERNEL); /*&voyager_asic_storage[asic_count];*/
 662                 if((*modpp)->asic == NULL) {
 663                         printk("**WARNING** kmalloc failure in cat_init\n");
 664                         continue;
 665                 }
 666                 memset((*modpp)->asic, 0, sizeof(voyager_asic_t));
 667                 (*modpp)->asic->asic_id = VOYAGER_CAT_ID;
 668                 (*modpp)->asic->subaddr = VOYAGER_SUBADDR_HI;
 669                 (*modpp)->module_addr = i;
 670                 (*modpp)->scan_path_connected = 0;
 671                 if(i == VOYAGER_PSI) {
 672                         /* Exception leg for modules with no EEPROM */
 673                         printk("Module \"%s\"\n", cat_module_name(i));
 674                         continue;
 675                 }
 676
 677                 CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET));
 678                 outb(VOYAGER_CAT_RUN, CAT_CMD);
 679                 cat_disconnect(*modpp, (*modpp)->asic);
 680                 if(cat_subread(*modpp, (*modpp)->asic,
 681                                VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size),
 682                                &eprom_size)) {
 683                         printk("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n", i);
 684                         outb(VOYAGER_CAT_END, CAT_CMD);
 685                         continue;
 686                 }
 687                 if(eprom_size > sizeof(eprom_buf)) {
 688                         printk("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x.  Need %d\n", i, eprom_size);
 689                         outb(VOYAGER_CAT_END, CAT_CMD);
 690                         continue;
 691                 }
 692                 outb(VOYAGER_CAT_END, CAT_CMD);
 693                 outb(VOYAGER_CAT_RUN, CAT_CMD);
 694                 CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i, eprom_size));
 695                 if(cat_subread(*modpp, (*modpp)->asic, 0,
 696                                eprom_size, eprom_buf)) {
 697                         outb(VOYAGER_CAT_END, CAT_CMD);
 698                         continue;
 699                 }
 700                 outb(VOYAGER_CAT_END, CAT_CMD);
 701                 printk("Module \"%s\", version 0x%x, tracer 0x%x, asics %d\n",
 702                        cat_module_name(i), eprom_hdr->version_id,
 703                        *((__u32 *)eprom_hdr->tracer),  eprom_hdr->num_asics);
 704                 (*modpp)->ee_size = eprom_hdr->ee_size;
 705                 (*modpp)->num_asics = eprom_hdr->num_asics;
 706                 asicpp = &((*modpp)->asic);
 707                 sp_offset = eprom_hdr->scan_path_offset;
 708                 /* All we really care about are the Quad cards.  We
 709                  * identify them because they are in a processor slot
 710                  * and have only four asics */
 711                 if((i < 0x10 || (i>=0x14 && i < 0x1c) || i>0x1f)) {
 712                         modpp = &((*modpp)->next);
 713                         continue;
 714                 }
 715                 /* Now we know it's in a processor slot, does it have
 716                  * a quad baseboard submodule */
 717                 outb(VOYAGER_CAT_RUN, CAT_CMD);
 718                 cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODPRESENT,
 719                          &num_submodules);
 720                 /* lowest two bits, active low */
 721                 num_submodules = ~(0xfc | num_submodules);
 722                 CDEBUG(("VOYAGER CAT: %d submodules present\n", num_submodules));
 723                 if(num_submodules == 0) {
 724                         /* fill in the dyadic extended processors */
 725                         __u8 cpu = i & 0x07;
 726
 727                         printk("Module \"%s\": Dyadic Processor Card\n",
 728                                cat_module_name(i));
 729                         voyager_extended_vic_processors |= (1<<cpu);
 730                         cpu += 4;
 731                         voyager_extended_vic_processors |= (1<<cpu);
 732                         outb(VOYAGER_CAT_END, CAT_CMD);
 733                         continue;
 734                 }
 735
 736                 /* now we want to read the asics on the first submodule,
 737                  * which should be the quad base board */
 738
 739                 cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, &val);
 740                 CDEBUG(("cat_init: SUBMODSELECT value = 0x%x\n", val));
 741                 val = (val & 0x7c) | VOYAGER_QUAD_BASEBOARD;
 742                 cat_write(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, val);
 743
 744                 outb(VOYAGER_CAT_END, CAT_CMD);
 745
 746
 747                 CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET));
 748                 outb(VOYAGER_CAT_RUN, CAT_CMD);
 749                 cat_disconnect(*modpp, (*modpp)->asic);
 750                 if(cat_subread(*modpp, (*modpp)->asic,
 751                                VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size),
 752                                &eprom_size)) {
 753                         printk("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n", i);
 754                         outb(VOYAGER_CAT_END, CAT_CMD);
 755                         continue;
 756                 }
 757                 if(eprom_size > sizeof(eprom_buf)) {
 758                         printk("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x.  Need %d\n", i, eprom_size);
 759                         outb(VOYAGER_CAT_END, CAT_CMD);
 760                         continue;
 761                 }
 762                 outb(VOYAGER_CAT_END, CAT_CMD);
 763                 outb(VOYAGER_CAT_RUN, CAT_CMD);
 764                 CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i, eprom_size));
 765                 if(cat_subread(*modpp, (*modpp)->asic, 0,
 766                                eprom_size, eprom_buf)) {
 767                         outb(VOYAGER_CAT_END, CAT_CMD);
 768                         continue;
 769                 }
 770                 outb(VOYAGER_CAT_END, CAT_CMD);
 771                 /* Now do everything for the QBB submodule 1 */
 772                 (*modpp)->ee_size = eprom_hdr->ee_size;
 773                 (*modpp)->num_asics = eprom_hdr->num_asics;
 774                 asicpp = &((*modpp)->asic);
 775                 sp_offset = eprom_hdr->scan_path_offset;
 776                 /* get rid of the dummy CAT asic and read the real one */
 777                 kfree((*modpp)->asic);
 778                 for(asic=0; asic < (*modpp)->num_asics; asic++) {
 779                         int j;
 780                         voyager_asic_t *asicp = *asicpp
 781                                 = kmalloc(sizeof(voyager_asic_t), GFP_KERNEL); /*&voyager_asic_storage[asic_count++];*/
 782                         voyager_sp_table_t *sp_table;
 783                         voyager_at_t *asic_table;
 784                         voyager_jtt_t *jtag_table;
 785
 786                         if(asicp == NULL) {
 787                                 printk("**WARNING** kmalloc failure in cat_init\n");
 788                                 continue;
 789                         }
 790                         memset(asicp, 0, sizeof(voyager_asic_t));
 791                         asicpp = &(asicp->next);
 792                         asicp->asic_location = asic;
 793                         sp_table = (voyager_sp_table_t *)(eprom_buf + sp_offset);
 794                         asicp->asic_id = sp_table->asic_id;
 795                         asic_table = (voyager_at_t *)(eprom_buf + sp_table->asic_data_offset);
 796                         for(j=0; j<4; j++)
 797                                 asicp->jtag_id[j] = asic_table->jtag_id[j];
 798                         jtag_table = (voyager_jtt_t *)(eprom_buf + asic_table->jtag_offset);
 799                         asicp->ireg_length = jtag_table->ireg_len;
 800                         asicp->bit_location = (*modpp)->inst_bits;
 801                         (*modpp)->inst_bits += asicp->ireg_length;
 802                         if(asicp->ireg_length > (*modpp)->largest_reg)
 803                                 (*modpp)->largest_reg = asicp->ireg_length;
 804                         if (asicp->ireg_length < (*modpp)->smallest_reg ||
 805                             (*modpp)->smallest_reg == 0)
 806                                 (*modpp)->smallest_reg = asicp->ireg_length;
 807                         CDEBUG(("asic 0x%x, ireg_length=%d, bit_location=%d\n",
 808                                 asicp->asic_id, asicp->ireg_length,
 809                                 asicp->bit_location));
 810                         if(asicp->asic_id == VOYAGER_QUAD_QABC) {
 811                                 CDEBUG(("VOYAGER CAT: QABC ASIC found\n"));
 812                                 qabc_asic = asicp;
 813                         }
 814                         sp_offset += sizeof(voyager_sp_table_t);
 815                 }
 816                 CDEBUG(("Module inst_bits = %d, largest_reg = %d, smallest_reg=%d\n",
 817                         (*modpp)->inst_bits, (*modpp)->largest_reg,
 818                         (*modpp)->smallest_reg));
 819                 /* OK, now we have the QUAD ASICs set up, use them.
 820                  * we need to:
 821                  *
 822                  * 1. Find the Memory area for the Quad CPIs.
 823                  * 2. Find the Extended VIC processor
 824                  * 3. Configure a second extended VIC processor (This
 825                  *    cannot be done for the 51xx.
 826                  * */
 827                 outb(VOYAGER_CAT_RUN, CAT_CMD);
 828                 cat_connect(*modpp, (*modpp)->asic);
 829                 CDEBUG(("CAT CONNECTED!!\n"));
 830                 cat_subread(*modpp, qabc_asic, 0, sizeof(qabc_data), qabc_data);
 831                 qic_addr = qabc_data[5] << 8;
 832                 qic_addr = (qic_addr | qabc_data[6]) << 8;
 833                 qic_addr = (qic_addr | qabc_data[7]) << 8;
 834                 printk("Module \"%s\": Quad Processor Card; CPI 0x%lx, SET=0x%x\n",
 835                        cat_module_name(i), qic_addr, qabc_data[8]);
 836 #if 0                           /* plumbing fails---FIXME */
 837                 if((qabc_data[8] & 0xf0) == 0) {
 838                         /* FIXME: 32 way 8 CPU slot monster cannot be
 839                          * plumbed this way---need to check for it */
 840
 841                         printk("Plumbing second Extended Quad Processor\n");
 842                         /* second VIC line hardwired to Quad CPU 1 */
 843                         qabc_data[8] |= 0x20;
 844                         cat_subwrite(*modpp, qabc_asic, 8, 1, &qabc_data[8]);
 845 #ifdef VOYAGER_CAT_DEBUG
 846                         /* verify plumbing */
 847                         cat_subread(*modpp, qabc_asic, 8, 1, &qabc_data[8]);
 848                         if((qabc_data[8] & 0xf0) == 0) {
 849                                 CDEBUG(("PLUMBING FAILED: 0x%x\n", qabc_data[8]));
 850                         }
 851 #endif
 852                 }
 853 #endif
 854
 855                 {
 856                         struct resource *res = kmalloc(sizeof(struct resource),GFP_KERNEL);
 857                         memset(res, 0, sizeof(struct resource));
 858                         res->name = kmalloc(128, GFP_KERNEL);
 859                         sprintf((char *)res->name, "Voyager %s Quad CPI", cat_module_name(i));
 860                         res->start = qic_addr;
 861                         res->end = qic_addr + 0x3ff;
 862                         request_resource(&iomem_resource, res);
 863                 }
 864
 865                 qic_addr = (unsigned long)ioremap(qic_addr, 0x400);
 866
 867                 for(j = 0; j < 4; j++) {
 868                         __u8 cpu;
 869
 870                         if(voyager_8slot) {
 871                                 /* 8 slot has a different mapping,
 872                                  * each slot has only one vic line, so
 873                                  * 1 cpu in each slot must be < 8 */
 874                                 cpu = (i & 0x07) + j*8;
 875                         } else {
 876                                 cpu = (i & 0x03) + j*4;
 877                         }
 878                         if( (qabc_data[8] & (1<<j))) {
 879                                 voyager_extended_vic_processors |= (1<<cpu);
 880                         }
 881                         if(qabc_data[8] & (1<<(j+4)) ) {
 882                                 /* Second SET register plumbed: Quad
 883                                  * card has two VIC connected CPUs.
 884                                  * Secondary cannot be booted as a VIC
 885                                  * CPU */
 886                                 voyager_extended_vic_processors |= (1<<cpu);
 887                                 voyager_allowed_boot_processors &= (~(1<<cpu));
 888                         }
 889
 890                         voyager_quad_processors |= (1<<cpu);
 891                         voyager_quad_cpi_addr[cpu] = (struct voyager_qic_cpi *)
 892                                 (qic_addr+(j<<8));
 893                         CDEBUG(("CPU%d: CPI address 0x%lx\n", cpu,
 894                                 (unsigned long)voyager_quad_cpi_addr[cpu]));
 895                 }
 896                 outb(VOYAGER_CAT_END, CAT_CMD);
 897
 898
 899
 900                 *asicpp = NULL;
 901                 modpp = &((*modpp)->next);
 902         }
 903         *modpp = NULL;
 904         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);
 905         request_resource(&ioport_resource, &vic_res);
 906         if(voyager_quad_processors)
 907                 request_resource(&ioport_resource, &qic_res);
 908         /* set up the front power switch */
 909 }
 910
 911 int
 912 voyager_cat_readb(__u8 module, __u8 asic, int reg)
 913 {
 914         return 0;
 915 }
 916
 917 static int
 918 cat_disconnect(voyager_module_t *modp, voyager_asic_t *asicp)
 919 {
 920         __u8 val;
 921         int err = 0;
 922
 923         if(!modp->scan_path_connected)
 924                 return 0;
 925         if(asicp->asic_id != VOYAGER_CAT_ID) {
 926                 CDEBUG(("cat_disconnect: ASIC is not CAT\n"));
 927                 return 1;
 928         }
 929         err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val);
 930         if(err) {
 931                 CDEBUG(("cat_disconnect: failed to read SCANPATH\n"));
 932                 return err;
 933         }
 934         val &= VOYAGER_DISCONNECT_ASIC;
 935         err = cat_write(modp, asicp, VOYAGER_SCANPATH, val);
 936         if(err) {
 937                 CDEBUG(("cat_disconnect: failed to write SCANPATH\n"));
 938                 return err;
 939         }
 940         outb(VOYAGER_CAT_END, CAT_CMD);
 941         outb(VOYAGER_CAT_RUN, CAT_CMD);
 942         modp->scan_path_connected = 0;
 943
 944         return 0;
 945 }
 946
 947 static int
 948 cat_connect(voyager_module_t *modp, voyager_asic_t *asicp)
 949 {
 950         __u8 val;
 951         int err = 0;
 952
 953         if(modp->scan_path_connected)
 954                 return 0;
 955         if(asicp->asic_id != VOYAGER_CAT_ID) {
 956                 CDEBUG(("cat_connect: ASIC is not CAT\n"));
 957                 return 1;
 958         }
 959
 960         err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val);
 961         if(err) {
 962                 CDEBUG(("cat_connect: failed to read SCANPATH\n"));
 963                 return err;
 964         }
 965         val |= VOYAGER_CONNECT_ASIC;
 966         err = cat_write(modp, asicp, VOYAGER_SCANPATH, val);
 967         if(err) {
 968                 CDEBUG(("cat_connect: failed to write SCANPATH\n"));
 969                 return err;
 970         }
 971         outb(VOYAGER_CAT_END, CAT_CMD);
 972         outb(VOYAGER_CAT_RUN, CAT_CMD);
 973         modp->scan_path_connected = 1;
 974
 975         return 0;
 976 }
 977
 978 void
 979 voyager_cat_power_off(void)
 980 {
 981         /* Power the machine off by writing to the PSI over the CAT
 982          * bus */
 983         __u8 data;
 984         voyager_module_t psi = { 0 };
 985         voyager_asic_t psi_asic = { 0 };
 986
 987         psi.asic = &psi_asic;
 988         psi.asic->asic_id = VOYAGER_CAT_ID;
 989         psi.asic->subaddr = VOYAGER_SUBADDR_HI;
 990         psi.module_addr = VOYAGER_PSI;
 991         psi.scan_path_connected = 0;
 992
 993         outb(VOYAGER_CAT_END, CAT_CMD);
 994         /* Connect the PSI to the CAT Bus */
 995         outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
 996         outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
 997         outb(VOYAGER_CAT_RUN, CAT_CMD);
 998         cat_disconnect(&psi, &psi_asic);
 999         /* Read the status */
1000         cat_subread(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
1001         outb(VOYAGER_CAT_END, CAT_CMD);
1002         CDEBUG(("PSI STATUS 0x%x\n", data));
1003         /* These two writes are power off prep and perform */
1004         data = PSI_CLEAR;
1005         outb(VOYAGER_CAT_RUN, CAT_CMD);
1006         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
1007         outb(VOYAGER_CAT_END, CAT_CMD);
1008         data = PSI_POWER_DOWN;
1009         outb(VOYAGER_CAT_RUN, CAT_CMD);
1010         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
1011         outb(VOYAGER_CAT_END, CAT_CMD);
1012 }
1013
1014 struct voyager_status voyager_status = { 0 };
1015
1016 void
1017 voyager_cat_psi(__u8 cmd, __u16 reg, __u8 *data)
1018 {
1019         voyager_module_t psi = { 0 };
1020         voyager_asic_t psi_asic = { 0 };
1021
1022         psi.asic = &psi_asic;
1023         psi.asic->asic_id = VOYAGER_CAT_ID;
1024         psi.asic->subaddr = VOYAGER_SUBADDR_HI;
1025         psi.module_addr = VOYAGER_PSI;
1026         psi.scan_path_connected = 0;
1027
1028         outb(VOYAGER_CAT_END, CAT_CMD);
1029         /* Connect the PSI to the CAT Bus */
1030         outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
1031         outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
1032         outb(VOYAGER_CAT_RUN, CAT_CMD);
1033         cat_disconnect(&psi, &psi_asic);
1034         switch(cmd) {
1035         case VOYAGER_PSI_READ:
1036                 cat_read(&psi, &psi_asic, reg, data);
1037                 break;
1038         case VOYAGER_PSI_WRITE:
1039                 cat_write(&psi, &psi_asic, reg, *data);
1040                 break;
1041         case VOYAGER_PSI_SUBREAD:
1042                 cat_subread(&psi, &psi_asic, reg, 1, data);
1043                 break;
1044         case VOYAGER_PSI_SUBWRITE:
1045                 cat_subwrite(&psi, &psi_asic, reg, 1, data);
1046                 break;
1047         default:
1048                 printk(KERN_ERR "Voyager PSI, unrecognised command %d\n", cmd);
1049                 break;
1050         }
1051         outb(VOYAGER_CAT_END, CAT_CMD);
1052 }
1053
1054 void
1055 voyager_cat_do_common_interrupt(void)
1056 {
1057         /* This is caused either by a memory parity error or something
1058          * in the PSI */
1059         __u8 data;
1060         voyager_module_t psi = { 0 };
1061         voyager_asic_t psi_asic = { 0 };
1062         struct voyager_psi psi_reg;
1063         int i;
1064  re_read:
1065         psi.asic = &psi_asic;
1066         psi.asic->asic_id = VOYAGER_CAT_ID;
1067         psi.asic->subaddr = VOYAGER_SUBADDR_HI;
1068         psi.module_addr = VOYAGER_PSI;
1069         psi.scan_path_connected = 0;
1070
1071         outb(VOYAGER_CAT_END, CAT_CMD);
1072         /* Connect the PSI to the CAT Bus */
1073         outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
1074         outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
1075         outb(VOYAGER_CAT_RUN, CAT_CMD);
1076         cat_disconnect(&psi, &psi_asic);
1077         /* Read the status.  NOTE: Need to read *all* the PSI regs here
1078          * otherwise the cmn int will be reasserted */
1079         for(i = 0; i < sizeof(psi_reg.regs); i++) {
1080                 cat_read(&psi, &psi_asic, i, &((__u8 *)&psi_reg.regs)[i]);
1081         }
1082         outb(VOYAGER_CAT_END, CAT_CMD);
1083         if((psi_reg.regs.checkbit & 0x02) == 0) {
1084                 psi_reg.regs.checkbit |= 0x02;
1085                 cat_write(&psi, &psi_asic, 5, psi_reg.regs.checkbit);
1086                 printk("VOYAGER RE-READ PSI\n");
1087                 goto re_read;
1088         }
1089         outb(VOYAGER_CAT_RUN, CAT_CMD);
1090         for(i = 0; i < sizeof(psi_reg.subregs); i++) {
1091                 /* This looks strange, but the PSI doesn't do auto increment
1092                  * correctly */
1093                 cat_subread(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG + i,
1094                             1, &((__u8 *)&psi_reg.subregs)[i]);
1095         }
1096         outb(VOYAGER_CAT_END, CAT_CMD);
1097 #ifdef VOYAGER_CAT_DEBUG
1098         printk("VOYAGER PSI: ");
1099         for(i=0; i<sizeof(psi_reg.regs); i++)
1100                 printk("%02x ", ((__u8 *)&psi_reg.regs)[i]);
1101         printk("\n           ");
1102         for(i=0; i<sizeof(psi_reg.subregs); i++)
1103                 printk("%02x ", ((__u8 *)&psi_reg.subregs)[i]);
1104         printk("\n");
1105 #endif
1106         if(psi_reg.regs.intstatus & PSI_MON) {
1107                 /* switch off or power fail */
1108
1109                 if(psi_reg.subregs.supply & PSI_SWITCH_OFF) {
1110                         if(voyager_status.switch_off) {
1111                                 printk(KERN_ERR "Voyager front panel switch turned off again---Immediate power off!\n");
1112                                 voyager_cat_power_off();
1113                                 /* not reached */
1114                         } else {
1115                                 printk(KERN_ERR "Voyager front panel switch turned off\n");
1116                                 voyager_status.switch_off = 1;
1117                                 voyager_status.request_from_kernel = 1;
1118                                 up(&kvoyagerd_sem);
1119                         }
1120                         /* Tell the hardware we're taking care of the
1121                          * shutdown, otherwise it will power the box off
1122                          * within 3 seconds of the switch being pressed and,
1123                          * which is much more important to us, continue to
1124                          * assert the common interrupt */
1125                         data = PSI_CLR_SWITCH_OFF;
1126                         outb(VOYAGER_CAT_RUN, CAT_CMD);
1127                         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG,
1128                                      1, &data);
1129                         outb(VOYAGER_CAT_END, CAT_CMD);
1130                 } else {
1131
1132                         VDEBUG(("Voyager ac fail reg 0x%x\n",
1133                                 psi_reg.subregs.ACfail));
1134                         if((psi_reg.subregs.ACfail & AC_FAIL_STAT_CHANGE) == 0) {
1135                                 /* No further update */
1136                                 return;
1137                         }
1138 #if 0
1139                         /* Don't bother trying to find out who failed.
1140                          * FIXME: This probably makes the code incorrect on
1141                          * anything other than a 345x */
1142                         for(i=0; i< 5; i++) {
1143                                 if( psi_reg.subregs.ACfail &(1<<i)) {
1144                                         break;
1145                                 }
1146                         }
1147                         printk(KERN_NOTICE "AC FAIL IN SUPPLY %d\n", i);
1148 #endif
1149                         /* DON'T do this: it shuts down the AC PSI
1150                         outb(VOYAGER_CAT_RUN, CAT_CMD);
1151                         data = PSI_MASK_MASK | i;
1152                         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_MASK,
1153                                      1, &data);
1154                         outb(VOYAGER_CAT_END, CAT_CMD);
1155                         */
1156                         printk(KERN_ERR "Voyager AC power failure\n");
1157                         outb(VOYAGER_CAT_RUN, CAT_CMD);
1158                         data = PSI_COLD_START;
1159                         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG,
1160                                      1, &data);
1161                         outb(VOYAGER_CAT_END, CAT_CMD);
1162                         voyager_status.power_fail = 1;
1163                         voyager_status.request_from_kernel = 1;
1164                         up(&kvoyagerd_sem);
1165                 }
1166
1167
1168         } else if(psi_reg.regs.intstatus & PSI_FAULT) {
1169                 /* Major fault! */
1170                 printk(KERN_ERR "Voyager PSI Detected major fault, immediate power off!\n");
1171                 voyager_cat_power_off();
1172                 /* not reached */
1173         } else if(psi_reg.regs.intstatus & (PSI_DC_FAIL | PSI_ALARM
1174                                             | PSI_CURRENT | PSI_DVM
1175                                             | PSI_PSCFAULT | PSI_STAT_CHG)) {
1176                 /* other psi fault */
1177
1178                 printk(KERN_WARNING "Voyager PSI status 0x%x\n", data);
1179                 /* clear the PSI fault */
1180                 outb(VOYAGER_CAT_RUN, CAT_CMD);
1181                 cat_write(&psi, &psi_asic, VOYAGER_PSI_STATUS_REG, 0);
1182                 outb(VOYAGER_CAT_END, CAT_CMD);
1183         }
1184 }