git.oblomov.eu Git - linux-2.6/blob - 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 }