git.oblomov.eu Git - linux-2.6/blob - arch/x86/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  * This file contains all the logic for manipulating the CAT bus
   8  * in a level 5 machine.
   9  *
  10  * The CAT bus is a serial configuration and test bus.  Its primary
  11  * uses are to probe the initial configuration of the system and to
  12  * diagnose error conditions when a system interrupt occurs.  The low
  13  * level interface is fairly primitive, so most of this file consists
  14  * of bit shift manipulations to send and receive packets on the
  15  * serial bus */
  16
  17 #include <linux/types.h>
  18 #include <linux/completion.h>
  19 #include <linux/sched.h>
  20 #include <asm/voyager.h>
  21 #include <asm/vic.h>
  22 #include <linux/ioport.h>
  23 #include <linux/init.h>
  24 #include <linux/slab.h>
  25 #include <linux/delay.h>
  26 #include <asm/io.h>
  27
  28 #ifdef VOYAGER_CAT_DEBUG
  29 #define CDEBUG(x)       printk x
  30 #else
  31 #define CDEBUG(x)
  32 #endif
  33
  34 /* the CAT command port */
  35 #define CAT_CMD         (sspb + 0xe)
  36 /* the CAT data port */
  37 #define CAT_DATA        (sspb + 0xd)
  38
  39 /* the internal cat functions */
  40 static void cat_pack(__u8 * msg, __u16 start_bit, __u8 * data, __u16 num_bits);
  41 static void cat_unpack(__u8 * msg, __u16 start_bit, __u8 * data,
  42                        __u16 num_bits);
  43 static void cat_build_header(__u8 * header, const __u16 len,
  44                              const __u16 smallest_reg_bits,
  45                              const __u16 longest_reg_bits);
  46 static int cat_sendinst(voyager_module_t * modp, voyager_asic_t * asicp,
  47                         __u8 reg, __u8 op);
  48 static int cat_getdata(voyager_module_t * modp, voyager_asic_t * asicp,
  49                        __u8 reg, __u8 * value);
  50 static int cat_shiftout(__u8 * data, __u16 data_bytes, __u16 header_bytes,
  51                         __u8 pad_bits);
  52 static int cat_write(voyager_module_t * modp, voyager_asic_t * asicp, __u8 reg,
  53                      __u8 value);
  54 static int cat_read(voyager_module_t * modp, voyager_asic_t * asicp, __u8 reg,
  55                     __u8 * value);
  56 static int cat_subread(voyager_module_t * modp, voyager_asic_t * asicp,
  57                        __u16 offset, __u16 len, void *buf);
  58 static int cat_senddata(voyager_module_t * modp, voyager_asic_t * asicp,
  59                         __u8 reg, __u8 value);
  60 static int cat_disconnect(voyager_module_t * modp, voyager_asic_t * asicp);
  61 static int cat_connect(voyager_module_t * modp, voyager_asic_t * asicp);
  62
  63 static inline const char *cat_module_name(int module_id)
  64 {
  65         switch (module_id) {
  66         case 0x10:
  67                 return "Processor Slot 0";
  68         case 0x11:
  69                 return "Processor Slot 1";
  70         case 0x12:
  71                 return "Processor Slot 2";
  72         case 0x13:
  73                 return "Processor Slot 4";
  74         case 0x14:
  75                 return "Memory Slot 0";
  76         case 0x15:
  77                 return "Memory Slot 1";
  78         case 0x18:
  79                 return "Primary Microchannel";
  80         case 0x19:
  81                 return "Secondary Microchannel";
  82         case 0x1a:
  83                 return "Power Supply Interface";
  84         case 0x1c:
  85                 return "Processor Slot 5";
  86         case 0x1d:
  87                 return "Processor Slot 6";
  88         case 0x1e:
  89                 return "Processor Slot 7";
  90         case 0x1f:
  91                 return "Processor Slot 8";
  92         default:
  93                 return "Unknown Module";
  94         }
  95 }
  96
  97 static int sspb = 0;            /* stores the super port location */
  98 int voyager_8slot = 0;          /* set to true if a 51xx monster */
  99
 100 voyager_module_t *voyager_cat_list;
 101
 102 /* the I/O port assignments for the VIC and QIC */
 103 static struct resource vic_res = {
 104         .name = "Voyager Interrupt Controller",
 105         .start = 0xFC00,
 106         .end = 0xFC6F
 107 };
 108 static struct resource qic_res = {
 109         .name = "Quad Interrupt Controller",
 110         .start = 0xFC70,
 111         .end = 0xFCFF
 112 };
 113
 114 /* This function is used to pack a data bit stream inside a message.
 115  * It writes num_bits of the data buffer in msg starting at start_bit.
 116  * Note: This function assumes that any unused bit in the data stream
 117  * is set to zero so that the ors will work correctly */
 118 static void
 119 cat_pack(__u8 * msg, const __u16 start_bit, __u8 * data, const __u16 num_bits)
 120 {
 121         /* compute initial shift needed */
 122         const __u16 offset = start_bit % BITS_PER_BYTE;
 123         __u16 len = num_bits / BITS_PER_BYTE;
 124         __u16 byte = start_bit / BITS_PER_BYTE;
 125         __u16 residue = (num_bits % BITS_PER_BYTE) + offset;
 126         int i;
 127
 128         /* adjust if we have more than a byte of residue */
 129         if (residue >= BITS_PER_BYTE) {
 130                 residue -= BITS_PER_BYTE;
 131                 len++;
 132         }
 133
 134         /* clear out the bits.  We assume here that if len==0 then
 135          * residue >= offset.  This is always true for the catbus
 136          * operations */
 137         msg[byte] &= 0xff << (BITS_PER_BYTE - offset);
 138         msg[byte++] |= data[0] >> offset;
 139         if (len == 0)
 140                 return;
 141         for (i = 1; i < len; i++)
 142                 msg[byte++] = (data[i - 1] << (BITS_PER_BYTE - offset))
 143                     | (data[i] >> offset);
 144         if (residue != 0) {
 145                 __u8 mask = 0xff >> residue;
 146                 __u8 last_byte = data[i - 1] << (BITS_PER_BYTE - offset)
 147                     | (data[i] >> offset);
 148
 149                 last_byte &= ~mask;
 150                 msg[byte] &= mask;
 151                 msg[byte] |= last_byte;
 152         }
 153         return;
 154 }
 155
 156 /* unpack the data again (same arguments as cat_pack()). data buffer
 157  * must be zero populated.
 158  *
 159  * Function: given a message string move to start_bit and copy num_bits into
 160  * data (starting at bit 0 in data).
 161  */
 162 static void
 163 cat_unpack(__u8 * msg, const __u16 start_bit, __u8 * data, const __u16 num_bits)
 164 {
 165         /* compute initial shift needed */
 166         const __u16 offset = start_bit % BITS_PER_BYTE;
 167         __u16 len = num_bits / BITS_PER_BYTE;
 168         const __u8 last_bits = num_bits % BITS_PER_BYTE;
 169         __u16 byte = start_bit / BITS_PER_BYTE;
 170         int i;
 171
 172         if (last_bits != 0)
 173                 len++;
 174
 175         /* special case: want < 8 bits from msg and we can get it from
 176          * a single byte of the msg */
 177         if (len == 0 && BITS_PER_BYTE - offset >= num_bits) {
 178                 data[0] = msg[byte] << offset;
 179                 data[0] &= 0xff >> (BITS_PER_BYTE - num_bits);
 180                 return;
 181         }
 182         for (i = 0; i < len; i++) {
 183                 /* this annoying if has to be done just in case a read of
 184                  * msg one beyond the array causes a panic */
 185                 if (offset != 0) {
 186                         data[i] = msg[byte++] << offset;
 187                         data[i] |= msg[byte] >> (BITS_PER_BYTE - offset);
 188                 } else {
 189                         data[i] = msg[byte++];
 190                 }
 191         }
 192         /* do we need to truncate the final byte */
 193         if (last_bits != 0) {
 194                 data[i - 1] &= 0xff << (BITS_PER_BYTE - last_bits);
 195         }
 196         return;
 197 }
 198
 199 static void
 200 cat_build_header(__u8 * header, const __u16 len, const __u16 smallest_reg_bits,
 201                  const __u16 longest_reg_bits)
 202 {
 203         int i;
 204         __u16 start_bit = (smallest_reg_bits - 1) % BITS_PER_BYTE;
 205         __u8 *last_byte = &header[len - 1];
 206
 207         if (start_bit == 0)
 208                 start_bit = 1;  /* must have at least one bit in the hdr */
 209
 210         for (i = 0; i < len; i++)
 211                 header[i] = 0;
 212
 213         for (i = start_bit; i > 0; i--)
 214                 *last_byte = ((*last_byte) << 1) + 1;
 215
 216 }
 217
 218 static int
 219 cat_sendinst(voyager_module_t * modp, voyager_asic_t * asicp, __u8 reg, __u8 op)
 220 {
 221         __u8 parity, inst, inst_buf[4] = { 0 };
 222         __u8 iseq[VOYAGER_MAX_SCAN_PATH], hseq[VOYAGER_MAX_REG_SIZE];
 223         __u16 ibytes, hbytes, padbits;
 224         int i;
 225
 226         /*
 227          * Parity is the parity of the register number + 1 (READ_REGISTER
 228          * and WRITE_REGISTER always add '1' to the number of bits == 1)
 229          */
 230         parity = (__u8) (1 + (reg & 0x01) +
 231                          ((__u8) (reg & 0x02) >> 1) +
 232                          ((__u8) (reg & 0x04) >> 2) +
 233                          ((__u8) (reg & 0x08) >> 3)) % 2;
 234
 235         inst = ((parity << 7) | (reg << 2) | op);
 236
 237         outb(VOYAGER_CAT_IRCYC, CAT_CMD);
 238         if (!modp->scan_path_connected) {
 239                 if (asicp->asic_id != VOYAGER_CAT_ID) {
 240                         printk
 241                             ("**WARNING***: cat_sendinst has disconnected scan path not to CAT asic\n");
 242                         return 1;
 243                 }
 244                 outb(VOYAGER_CAT_HEADER, CAT_DATA);
 245                 outb(inst, CAT_DATA);
 246                 if (inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
 247                         CDEBUG(("VOYAGER CAT: cat_sendinst failed to get CAT_HEADER\n"));
 248                         return 1;
 249                 }
 250                 return 0;
 251         }
 252         ibytes = modp->inst_bits / BITS_PER_BYTE;
 253         if ((padbits = modp->inst_bits % BITS_PER_BYTE) != 0) {
 254                 padbits = BITS_PER_BYTE - padbits;
 255                 ibytes++;
 256         }
 257         hbytes = modp->largest_reg / BITS_PER_BYTE;
 258         if (modp->largest_reg % BITS_PER_BYTE)
 259                 hbytes++;
 260         CDEBUG(("cat_sendinst: ibytes=%d, hbytes=%d\n", ibytes, hbytes));
 261         /* initialise the instruction sequence to 0xff */
 262         for (i = 0; i < ibytes + hbytes; i++)
 263                 iseq[i] = 0xff;
 264         cat_build_header(hseq, hbytes, modp->smallest_reg, modp->largest_reg);
 265         cat_pack(iseq, modp->inst_bits, hseq, hbytes * BITS_PER_BYTE);
 266         inst_buf[0] = inst;
 267         inst_buf[1] = 0xFF >> (modp->largest_reg % BITS_PER_BYTE);
 268         cat_pack(iseq, asicp->bit_location, inst_buf, asicp->ireg_length);
 269 #ifdef VOYAGER_CAT_DEBUG
 270         printk("ins = 0x%x, iseq: ", inst);
 271         for (i = 0; i < ibytes + hbytes; i++)
 272                 printk("0x%x ", iseq[i]);
 273         printk("\n");
 274 #endif
 275         if (cat_shiftout(iseq, ibytes, hbytes, padbits)) {
 276                 CDEBUG(("VOYAGER CAT: cat_sendinst: cat_shiftout failed\n"));
 277                 return 1;
 278         }
 279         CDEBUG(("CAT SHIFTOUT DONE\n"));
 280         return 0;
 281 }
 282
 283 static int
 284 cat_getdata(voyager_module_t * modp, voyager_asic_t * asicp, __u8 reg,
 285             __u8 * value)
 286 {
 287         if (!modp->scan_path_connected) {
 288                 if (asicp->asic_id != VOYAGER_CAT_ID) {
 289                         CDEBUG(("VOYAGER CAT: ERROR: cat_getdata to CAT asic with scan path connected\n"));
 290                         return 1;
 291                 }
 292                 if (reg > VOYAGER_SUBADDRHI)
 293                         outb(VOYAGER_CAT_RUN, CAT_CMD);
 294                 outb(VOYAGER_CAT_DRCYC, CAT_CMD);
 295                 outb(VOYAGER_CAT_HEADER, CAT_DATA);
 296                 *value = inb(CAT_DATA);
 297                 outb(0xAA, CAT_DATA);
 298                 if (inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
 299                         CDEBUG(("cat_getdata: failed to get VOYAGER_CAT_HEADER\n"));
 300                         return 1;
 301                 }
 302                 return 0;
 303         } else {
 304                 __u16 sbits = modp->num_asics - 1 + asicp->ireg_length;
 305                 __u16 sbytes = sbits / BITS_PER_BYTE;
 306                 __u16 tbytes;
 307                 __u8 string[VOYAGER_MAX_SCAN_PATH],
 308                     trailer[VOYAGER_MAX_REG_SIZE];
 309                 __u8 padbits;
 310                 int i;
 311
 312                 outb(VOYAGER_CAT_DRCYC, CAT_CMD);
 313
 314                 if ((padbits = sbits % BITS_PER_BYTE) != 0) {
 315                         padbits = BITS_PER_BYTE - padbits;
 316                         sbytes++;
 317                 }
 318                 tbytes = asicp->ireg_length / BITS_PER_BYTE;
 319                 if (asicp->ireg_length % BITS_PER_BYTE)
 320                         tbytes++;
 321                 CDEBUG(("cat_getdata: tbytes = %d, sbytes = %d, padbits = %d\n",
 322                         tbytes, sbytes, padbits));
 323                 cat_build_header(trailer, tbytes, 1, asicp->ireg_length);
 324
 325                 for (i = tbytes - 1; i >= 0; i--) {
 326                         outb(trailer[i], CAT_DATA);
 327                         string[sbytes + i] = inb(CAT_DATA);
 328                 }
 329
 330                 for (i = sbytes - 1; i >= 0; i--) {
 331                         outb(0xaa, CAT_DATA);
 332                         string[i] = inb(CAT_DATA);
 333                 }
 334                 *value = 0;
 335                 cat_unpack(string,
 336                            padbits + (tbytes * BITS_PER_BYTE) +
 337                            asicp->asic_location, value, asicp->ireg_length);
 338 #ifdef VOYAGER_CAT_DEBUG
 339                 printk("value=0x%x, string: ", *value);
 340                 for (i = 0; i < tbytes + sbytes; i++)
 341                         printk("0x%x ", string[i]);
 342                 printk("\n");
 343 #endif
 344
 345                 /* sanity check the rest of the return */
 346                 for (i = 0; i < tbytes; i++) {
 347                         __u8 input = 0;
 348
 349                         cat_unpack(string, padbits + (i * BITS_PER_BYTE),
 350                                    &input, BITS_PER_BYTE);
 351                         if (trailer[i] != input) {
 352                                 CDEBUG(("cat_getdata: failed to sanity check rest of ret(%d) 0x%x != 0x%x\n", i, input, trailer[i]));
 353                                 return 1;
 354                         }
 355                 }
 356                 CDEBUG(("cat_getdata DONE\n"));
 357                 return 0;
 358         }
 359 }
 360
 361 static int
 362 cat_shiftout(__u8 * data, __u16 data_bytes, __u16 header_bytes, __u8 pad_bits)
 363 {
 364         int i;
 365
 366         for (i = data_bytes + header_bytes - 1; i >= header_bytes; i--)
 367                 outb(data[i], CAT_DATA);
 368
 369         for (i = header_bytes - 1; i >= 0; i--) {
 370                 __u8 header = 0;
 371                 __u8 input;
 372
 373                 outb(data[i], CAT_DATA);
 374                 input = inb(CAT_DATA);
 375                 CDEBUG(("cat_shiftout: returned 0x%x\n", input));
 376                 cat_unpack(data, ((data_bytes + i) * BITS_PER_BYTE) - pad_bits,
 377                            &header, BITS_PER_BYTE);
 378                 if (input != header) {
 379                         CDEBUG(("VOYAGER CAT: cat_shiftout failed to return header 0x%x != 0x%x\n", input, header));
 380                         return 1;
 381                 }
 382         }
 383         return 0;
 384 }
 385
 386 static int
 387 cat_senddata(voyager_module_t * modp, voyager_asic_t * asicp,
 388              __u8 reg, __u8 value)
 389 {
 390         outb(VOYAGER_CAT_DRCYC, CAT_CMD);
 391         if (!modp->scan_path_connected) {
 392                 if (asicp->asic_id != VOYAGER_CAT_ID) {
 393                         CDEBUG(("VOYAGER CAT: ERROR: scan path disconnected when asic != CAT\n"));
 394                         return 1;
 395                 }
 396                 outb(VOYAGER_CAT_HEADER, CAT_DATA);
 397                 outb(value, CAT_DATA);
 398                 if (inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
 399                         CDEBUG(("cat_senddata: failed to get correct header response to sent data\n"));
 400                         return 1;
 401                 }
 402                 if (reg > VOYAGER_SUBADDRHI) {
 403                         outb(VOYAGER_CAT_RUN, CAT_CMD);
 404                         outb(VOYAGER_CAT_END, CAT_CMD);
 405                         outb(VOYAGER_CAT_RUN, CAT_CMD);
 406                 }
 407
 408                 return 0;
 409         } else {
 410                 __u16 hbytes = asicp->ireg_length / BITS_PER_BYTE;
 411                 __u16 dbytes =
 412                     (modp->num_asics - 1 + asicp->ireg_length) / BITS_PER_BYTE;
 413                 __u8 padbits, dseq[VOYAGER_MAX_SCAN_PATH],
 414                     hseq[VOYAGER_MAX_REG_SIZE];
 415                 int i;
 416
 417                 if ((padbits = (modp->num_asics - 1
 418                                 + asicp->ireg_length) % BITS_PER_BYTE) != 0) {
 419                         padbits = BITS_PER_BYTE - padbits;
 420                         dbytes++;
 421                 }
 422                 if (asicp->ireg_length % BITS_PER_BYTE)
 423                         hbytes++;
 424
 425                 cat_build_header(hseq, hbytes, 1, asicp->ireg_length);
 426
 427                 for (i = 0; i < dbytes + hbytes; i++)
 428                         dseq[i] = 0xff;
 429                 CDEBUG(("cat_senddata: dbytes=%d, hbytes=%d, padbits=%d\n",
 430                         dbytes, hbytes, padbits));
 431                 cat_pack(dseq, modp->num_asics - 1 + asicp->ireg_length,
 432                          hseq, hbytes * BITS_PER_BYTE);
 433                 cat_pack(dseq, asicp->asic_location, &value,
 434                          asicp->ireg_length);
 435 #ifdef VOYAGER_CAT_DEBUG
 436                 printk("dseq ");
 437                 for (i = 0; i < hbytes + dbytes; i++) {
 438                         printk("0x%x ", dseq[i]);
 439                 }
 440                 printk("\n");
 441 #endif
 442                 return cat_shiftout(dseq, dbytes, hbytes, padbits);
 443         }
 444 }
 445
 446 static int
 447 cat_write(voyager_module_t * modp, voyager_asic_t * asicp, __u8 reg, __u8 value)
 448 {
 449         if (cat_sendinst(modp, asicp, reg, VOYAGER_WRITE_CONFIG))
 450                 return 1;
 451         return cat_senddata(modp, asicp, reg, value);
 452 }
 453
 454 static int
 455 cat_read(voyager_module_t * modp, voyager_asic_t * asicp, __u8 reg,
 456          __u8 * value)
 457 {
 458         if (cat_sendinst(modp, asicp, reg, VOYAGER_READ_CONFIG))
 459                 return 1;
 460         return cat_getdata(modp, asicp, reg, value);
 461 }
 462
 463 static int
 464 cat_subaddrsetup(voyager_module_t * modp, voyager_asic_t * asicp, __u16 offset,
 465                  __u16 len)
 466 {
 467         __u8 val;
 468
 469         if (len > 1) {
 470                 /* set auto increment */
 471                 __u8 newval;
 472
 473                 if (cat_read(modp, asicp, VOYAGER_AUTO_INC_REG, &val)) {
 474                         CDEBUG(("cat_subaddrsetup: read of VOYAGER_AUTO_INC_REG failed\n"));
 475                         return 1;
 476                 }
 477                 CDEBUG(("cat_subaddrsetup: VOYAGER_AUTO_INC_REG = 0x%x\n",
 478                         val));
 479                 newval = val | VOYAGER_AUTO_INC;
 480                 if (newval != val) {
 481                         if (cat_write(modp, asicp, VOYAGER_AUTO_INC_REG, val)) {
 482                                 CDEBUG(("cat_subaddrsetup: write to VOYAGER_AUTO_INC_REG failed\n"));
 483                                 return 1;
 484                         }
 485                 }
 486         }
 487         if (cat_write(modp, asicp, VOYAGER_SUBADDRLO, (__u8) (offset & 0xff))) {
 488                 CDEBUG(("cat_subaddrsetup: write to SUBADDRLO failed\n"));
 489                 return 1;
 490         }
 491         if (asicp->subaddr > VOYAGER_SUBADDR_LO) {
 492                 if (cat_write
 493                     (modp, asicp, VOYAGER_SUBADDRHI, (__u8) (offset >> 8))) {
 494                         CDEBUG(("cat_subaddrsetup: write to SUBADDRHI failed\n"));
 495                         return 1;
 496                 }
 497                 cat_read(modp, asicp, VOYAGER_SUBADDRHI, &val);
 498                 CDEBUG(("cat_subaddrsetup: offset = %d, hi = %d\n", offset,
 499                         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
 527             (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
 534                             ("cat_subwrite: cat_sendata element at %d FAILED\n",
 535                              i);
 536                         return 1;
 537                 }
 538         }
 539         return 0;
 540 }
 541 static int
 542 cat_subread(voyager_module_t * modp, voyager_asic_t * asicp, __u16 offset,
 543             __u16 len, void *buf)
 544 {
 545         int i, retval;
 546
 547         if ((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) {
 548                 CDEBUG(("cat_subread: cat_subaddrsetup FAILED\n"));
 549                 return retval;
 550         }
 551
 552         if (cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_READ_CONFIG)) {
 553                 CDEBUG(("cat_subread: cat_sendinst failed\n"));
 554                 return 1;
 555         }
 556         for (i = 0; i < len; i++) {
 557                 if (cat_getdata(modp, asicp, 0xFF, &((__u8 *) buf)[i])) {
 558                         CDEBUG(("cat_subread: cat_getdata element %d failed\n",
 559                                 i));
 560                         return 1;
 561                 }
 562         }
 563         return 0;
 564 }
 565
 566 /* buffer for storing EPROM data read in during initialisation */
 567 static __initdata __u8 eprom_buf[0xFFFF];
 568 static voyager_module_t *voyager_initial_module;
 569
 570 /* Initialise the cat bus components.  We assume this is called by the
 571  * boot cpu *after* all memory initialisation has been done (so we can
 572  * use kmalloc) but before smp initialisation, so we can probe the SMP
 573  * configuration and pick up necessary information.  */
 574 void __init 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
 594                        "Voyager failed to get SUS mailbox (addr = 0x%lx\n",
 595                        addr);
 596         } else {
 597                 static struct resource res;
 598
 599                 res.name = "voyager SUS";
 600                 res.start = addr;
 601                 res.end = addr + 0x3ff;
 602
 603                 request_resource(&iomem_resource, &res);
 604                 voyager_SUS = (struct voyager_SUS *)
 605                     ioremap(addr, 0x400);
 606                 printk(KERN_NOTICE "Voyager SUS mailbox version 0x%x\n",
 607                        voyager_SUS->SUS_version);
 608                 voyager_SUS->kernel_version = VOYAGER_MAILBOX_VERSION;
 609                 voyager_SUS->kernel_flags = VOYAGER_OS_HAS_SYSINT;
 610         }
 611
 612         /* clear the processor counts */
 613         voyager_extended_vic_processors = 0;
 614         voyager_quad_processors = 0;
 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
 627                        "Voyager: Eight slot 51xx configuration detected\n");
 628         }
 629
 630         for (i = VOYAGER_MIN_MODULE; 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
 684                             ("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n",
 685                              i);
 686                         outb(VOYAGER_CAT_END, CAT_CMD);
 687                         continue;
 688                 }
 689                 if (eprom_size > sizeof(eprom_buf)) {
 690                         printk
 691                             ("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x.  Need %d\n",
 692                              i, eprom_size);
 693                         outb(VOYAGER_CAT_END, CAT_CMD);
 694                         continue;
 695                 }
 696                 outb(VOYAGER_CAT_END, CAT_CMD);
 697                 outb(VOYAGER_CAT_RUN, CAT_CMD);
 698                 CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i,
 699                         eprom_size));
 700                 if (cat_subread
 701                     (*modpp, (*modpp)->asic, 0, eprom_size, eprom_buf)) {
 702                         outb(VOYAGER_CAT_END, CAT_CMD);
 703                         continue;
 704                 }
 705                 outb(VOYAGER_CAT_END, CAT_CMD);
 706                 printk("Module \"%s\", version 0x%x, tracer 0x%x, asics %d\n",
 707                        cat_module_name(i), eprom_hdr->version_id,
 708                        *((__u32 *) eprom_hdr->tracer), eprom_hdr->num_asics);
 709                 (*modpp)->ee_size = eprom_hdr->ee_size;
 710                 (*modpp)->num_asics = eprom_hdr->num_asics;
 711                 asicpp = &((*modpp)->asic);
 712                 sp_offset = eprom_hdr->scan_path_offset;
 713                 /* All we really care about are the Quad cards.  We
 714                  * identify them because they are in a processor slot
 715                  * and have only four asics */
 716                 if ((i < 0x10 || (i >= 0x14 && i < 0x1c) || i > 0x1f)) {
 717                         modpp = &((*modpp)->next);
 718                         continue;
 719                 }
 720                 /* Now we know it's in a processor slot, does it have
 721                  * a quad baseboard submodule */
 722                 outb(VOYAGER_CAT_RUN, CAT_CMD);
 723                 cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODPRESENT,
 724                          &num_submodules);
 725                 /* lowest two bits, active low */
 726                 num_submodules = ~(0xfc | num_submodules);
 727                 CDEBUG(("VOYAGER CAT: %d submodules present\n",
 728                         num_submodules));
 729                 if (num_submodules == 0) {
 730                         /* fill in the dyadic extended processors */
 731                         __u8 cpu = i & 0x07;
 732
 733                         printk("Module \"%s\": Dyadic Processor Card\n",
 734                                cat_module_name(i));
 735                         voyager_extended_vic_processors |= (1 << cpu);
 736                         cpu += 4;
 737                         voyager_extended_vic_processors |= (1 << cpu);
 738                         outb(VOYAGER_CAT_END, CAT_CMD);
 739                         continue;
 740                 }
 741
 742                 /* now we want to read the asics on the first submodule,
 743                  * which should be the quad base board */
 744
 745                 cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, &val);
 746                 CDEBUG(("cat_init: SUBMODSELECT value = 0x%x\n", val));
 747                 val = (val & 0x7c) | VOYAGER_QUAD_BASEBOARD;
 748                 cat_write(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, val);
 749
 750                 outb(VOYAGER_CAT_END, CAT_CMD);
 751
 752                 CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET));
 753                 outb(VOYAGER_CAT_RUN, CAT_CMD);
 754                 cat_disconnect(*modpp, (*modpp)->asic);
 755                 if (cat_subread(*modpp, (*modpp)->asic,
 756                                 VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size),
 757                                 &eprom_size)) {
 758                         printk
 759                             ("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n",
 760                              i);
 761                         outb(VOYAGER_CAT_END, CAT_CMD);
 762                         continue;
 763                 }
 764                 if (eprom_size > sizeof(eprom_buf)) {
 765                         printk
 766                             ("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x.  Need %d\n",
 767                              i, eprom_size);
 768                         outb(VOYAGER_CAT_END, CAT_CMD);
 769                         continue;
 770                 }
 771                 outb(VOYAGER_CAT_END, CAT_CMD);
 772                 outb(VOYAGER_CAT_RUN, CAT_CMD);
 773                 CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i,
 774                         eprom_size));
 775                 if (cat_subread
 776                     (*modpp, (*modpp)->asic, 0, eprom_size, eprom_buf)) {
 777                         outb(VOYAGER_CAT_END, CAT_CMD);
 778                         continue;
 779                 }
 780                 outb(VOYAGER_CAT_END, CAT_CMD);
 781                 /* Now do everything for the QBB submodule 1 */
 782                 (*modpp)->ee_size = eprom_hdr->ee_size;
 783                 (*modpp)->num_asics = eprom_hdr->num_asics;
 784                 asicpp = &((*modpp)->asic);
 785                 sp_offset = eprom_hdr->scan_path_offset;
 786                 /* get rid of the dummy CAT asic and read the real one */
 787                 kfree((*modpp)->asic);
 788                 for (asic = 0; asic < (*modpp)->num_asics; asic++) {
 789                         int j;
 790                         voyager_asic_t *asicp = *asicpp = kzalloc(sizeof(voyager_asic_t), GFP_KERNEL);  /*&voyager_asic_storage[asic_count++]; */
 791                         voyager_sp_table_t *sp_table;
 792                         voyager_at_t *asic_table;
 793                         voyager_jtt_t *jtag_table;
 794
 795                         if (asicp == NULL) {
 796                                 printk
 797                                     ("**WARNING** kmalloc failure in cat_init\n");
 798                                 continue;
 799                         }
 800                         asicpp = &(asicp->next);
 801                         asicp->asic_location = asic;
 802                         sp_table =
 803                             (voyager_sp_table_t *) (eprom_buf + sp_offset);
 804                         asicp->asic_id = sp_table->asic_id;
 805                         asic_table =
 806                             (voyager_at_t *) (eprom_buf +
 807                                               sp_table->asic_data_offset);
 808                         for (j = 0; j < 4; j++)
 809                                 asicp->jtag_id[j] = asic_table->jtag_id[j];
 810                         jtag_table =
 811                             (voyager_jtt_t *) (eprom_buf +
 812                                                asic_table->jtag_offset);
 813                         asicp->ireg_length = jtag_table->ireg_len;
 814                         asicp->bit_location = (*modpp)->inst_bits;
 815                         (*modpp)->inst_bits += asicp->ireg_length;
 816                         if (asicp->ireg_length > (*modpp)->largest_reg)
 817                                 (*modpp)->largest_reg = asicp->ireg_length;
 818                         if (asicp->ireg_length < (*modpp)->smallest_reg ||
 819                             (*modpp)->smallest_reg == 0)
 820                                 (*modpp)->smallest_reg = asicp->ireg_length;
 821                         CDEBUG(("asic 0x%x, ireg_length=%d, bit_location=%d\n",
 822                                 asicp->asic_id, asicp->ireg_length,
 823                                 asicp->bit_location));
 824                         if (asicp->asic_id == VOYAGER_QUAD_QABC) {
 825                                 CDEBUG(("VOYAGER CAT: QABC ASIC found\n"));
 826                                 qabc_asic = asicp;
 827                         }
 828                         sp_offset += sizeof(voyager_sp_table_t);
 829                 }
 830                 CDEBUG(("Module inst_bits = %d, largest_reg = %d, smallest_reg=%d\n", (*modpp)->inst_bits, (*modpp)->largest_reg, (*modpp)->smallest_reg));
 831                 /* OK, now we have the QUAD ASICs set up, use them.
 832                  * we need to:
 833                  *
 834                  * 1. Find the Memory area for the Quad CPIs.
 835                  * 2. Find the Extended VIC processor
 836                  * 3. Configure a second extended VIC processor (This
 837                  *    cannot be done for the 51xx.
 838                  * */
 839                 outb(VOYAGER_CAT_RUN, CAT_CMD);
 840                 cat_connect(*modpp, (*modpp)->asic);
 841                 CDEBUG(("CAT CONNECTED!!\n"));
 842                 cat_subread(*modpp, qabc_asic, 0, sizeof(qabc_data), qabc_data);
 843                 qic_addr = qabc_data[5] << 8;
 844                 qic_addr = (qic_addr | qabc_data[6]) << 8;
 845                 qic_addr = (qic_addr | qabc_data[7]) << 8;
 846                 printk
 847                     ("Module \"%s\": Quad Processor Card; CPI 0x%lx, SET=0x%x\n",
 848                      cat_module_name(i), qic_addr, qabc_data[8]);
 849 #if 0                           /* plumbing fails---FIXME */
 850                 if ((qabc_data[8] & 0xf0) == 0) {
 851                         /* FIXME: 32 way 8 CPU slot monster cannot be
 852                          * plumbed this way---need to check for it */
 853
 854                         printk("Plumbing second Extended Quad Processor\n");
 855                         /* second VIC line hardwired to Quad CPU 1 */
 856                         qabc_data[8] |= 0x20;
 857                         cat_subwrite(*modpp, qabc_asic, 8, 1, &qabc_data[8]);
 858 #ifdef VOYAGER_CAT_DEBUG
 859                         /* verify plumbing */
 860                         cat_subread(*modpp, qabc_asic, 8, 1, &qabc_data[8]);
 861                         if ((qabc_data[8] & 0xf0) == 0) {
 862                                 CDEBUG(("PLUMBING FAILED: 0x%x\n",
 863                                         qabc_data[8]));
 864                         }
 865 #endif
 866                 }
 867 #endif
 868
 869                 {
 870                         struct resource *res =
 871                             kzalloc(sizeof(struct resource), GFP_KERNEL);
 872                         res->name = kmalloc(128, GFP_KERNEL);
 873                         sprintf((char *)res->name, "Voyager %s Quad CPI",
 874                                 cat_module_name(i));
 875                         res->start = qic_addr;
 876                         res->end = qic_addr + 0x3ff;
 877                         request_resource(&iomem_resource, res);
 878                 }
 879
 880                 qic_addr = (unsigned long)ioremap_cache(qic_addr, 0x400);
 881
 882                 for (j = 0; j < 4; j++) {
 883                         __u8 cpu;
 884
 885                         if (voyager_8slot) {
 886                                 /* 8 slot has a different mapping,
 887                                  * each slot has only one vic line, so
 888                                  * 1 cpu in each slot must be < 8 */
 889                                 cpu = (i & 0x07) + j * 8;
 890                         } else {
 891                                 cpu = (i & 0x03) + j * 4;
 892                         }
 893                         if ((qabc_data[8] & (1 << j))) {
 894                                 voyager_extended_vic_processors |= (1 << cpu);
 895                         }
 896                         if (qabc_data[8] & (1 << (j + 4))) {
 897                                 /* Second SET register plumbed: Quad
 898                                  * card has two VIC connected CPUs.
 899                                  * Secondary cannot be booted as a VIC
 900                                  * CPU */
 901                                 voyager_extended_vic_processors |= (1 << cpu);
 902                                 voyager_allowed_boot_processors &=
 903                                     (~(1 << cpu));
 904                         }
 905
 906                         voyager_quad_processors |= (1 << cpu);
 907                         voyager_quad_cpi_addr[cpu] = (struct voyager_qic_cpi *)
 908                             (qic_addr + (j << 8));
 909                         CDEBUG(("CPU%d: CPI address 0x%lx\n", cpu,
 910                                 (unsigned long)voyager_quad_cpi_addr[cpu]));
 911                 }
 912                 outb(VOYAGER_CAT_END, CAT_CMD);
 913
 914                 *asicpp = NULL;
 915                 modpp = &((*modpp)->next);
 916         }
 917         *modpp = NULL;
 918         printk
 919             ("CAT Bus Initialisation finished: extended procs 0x%x, quad procs 0x%x, allowed vic boot = 0x%x\n",
 920              voyager_extended_vic_processors, voyager_quad_processors,
 921              voyager_allowed_boot_processors);
 922         request_resource(&ioport_resource, &vic_res);
 923         if (voyager_quad_processors)
 924                 request_resource(&ioport_resource, &qic_res);
 925         /* set up the front power switch */
 926 }
 927
 928 int voyager_cat_readb(__u8 module, __u8 asic, int reg)
 929 {
 930         return 0;
 931 }
 932
 933 static int cat_disconnect(voyager_module_t * modp, voyager_asic_t * asicp)
 934 {
 935         __u8 val;
 936         int err = 0;
 937
 938         if (!modp->scan_path_connected)
 939                 return 0;
 940         if (asicp->asic_id != VOYAGER_CAT_ID) {
 941                 CDEBUG(("cat_disconnect: ASIC is not CAT\n"));
 942                 return 1;
 943         }
 944         err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val);
 945         if (err) {
 946                 CDEBUG(("cat_disconnect: failed to read SCANPATH\n"));
 947                 return err;
 948         }
 949         val &= VOYAGER_DISCONNECT_ASIC;
 950         err = cat_write(modp, asicp, VOYAGER_SCANPATH, val);
 951         if (err) {
 952                 CDEBUG(("cat_disconnect: failed to write SCANPATH\n"));
 953                 return err;
 954         }
 955         outb(VOYAGER_CAT_END, CAT_CMD);
 956         outb(VOYAGER_CAT_RUN, CAT_CMD);
 957         modp->scan_path_connected = 0;
 958
 959         return 0;
 960 }
 961
 962 static int cat_connect(voyager_module_t * modp, voyager_asic_t * asicp)
 963 {
 964         __u8 val;
 965         int err = 0;
 966
 967         if (modp->scan_path_connected)
 968                 return 0;
 969         if (asicp->asic_id != VOYAGER_CAT_ID) {
 970                 CDEBUG(("cat_connect: ASIC is not CAT\n"));
 971                 return 1;
 972         }
 973
 974         err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val);
 975         if (err) {
 976                 CDEBUG(("cat_connect: failed to read SCANPATH\n"));
 977                 return err;
 978         }
 979         val |= VOYAGER_CONNECT_ASIC;
 980         err = cat_write(modp, asicp, VOYAGER_SCANPATH, val);
 981         if (err) {
 982                 CDEBUG(("cat_connect: failed to write SCANPATH\n"));
 983                 return err;
 984         }
 985         outb(VOYAGER_CAT_END, CAT_CMD);
 986         outb(VOYAGER_CAT_RUN, CAT_CMD);
 987         modp->scan_path_connected = 1;
 988
 989         return 0;
 990 }
 991
 992 void voyager_cat_power_off(void)
 993 {
 994         /* Power the machine off by writing to the PSI over the CAT
 995          * bus */
 996         __u8 data;
 997         voyager_module_t psi = { 0 };
 998         voyager_asic_t psi_asic = { 0 };
 999
1000         psi.asic = &psi_asic;
1001         psi.asic->asic_id = VOYAGER_CAT_ID;
1002         psi.asic->subaddr = VOYAGER_SUBADDR_HI;
1003         psi.module_addr = VOYAGER_PSI;
1004         psi.scan_path_connected = 0;
1005
1006         outb(VOYAGER_CAT_END, CAT_CMD);
1007         /* Connect the PSI to the CAT Bus */
1008         outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
1009         outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
1010         outb(VOYAGER_CAT_RUN, CAT_CMD);
1011         cat_disconnect(&psi, &psi_asic);
1012         /* Read the status */
1013         cat_subread(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
1014         outb(VOYAGER_CAT_END, CAT_CMD);
1015         CDEBUG(("PSI STATUS 0x%x\n", data));
1016         /* These two writes are power off prep and perform */
1017         data = PSI_CLEAR;
1018         outb(VOYAGER_CAT_RUN, CAT_CMD);
1019         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
1020         outb(VOYAGER_CAT_END, CAT_CMD);
1021         data = PSI_POWER_DOWN;
1022         outb(VOYAGER_CAT_RUN, CAT_CMD);
1023         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
1024         outb(VOYAGER_CAT_END, CAT_CMD);
1025 }
1026
1027 struct voyager_status voyager_status = { 0 };
1028
1029 void voyager_cat_psi(__u8 cmd, __u16 reg, __u8 * data)
1030 {
1031         voyager_module_t psi = { 0 };
1032         voyager_asic_t psi_asic = { 0 };
1033
1034         psi.asic = &psi_asic;
1035         psi.asic->asic_id = VOYAGER_CAT_ID;
1036         psi.asic->subaddr = VOYAGER_SUBADDR_HI;
1037         psi.module_addr = VOYAGER_PSI;
1038         psi.scan_path_connected = 0;
1039
1040         outb(VOYAGER_CAT_END, CAT_CMD);
1041         /* Connect the PSI to the CAT Bus */
1042         outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
1043         outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
1044         outb(VOYAGER_CAT_RUN, CAT_CMD);
1045         cat_disconnect(&psi, &psi_asic);
1046         switch (cmd) {
1047         case VOYAGER_PSI_READ:
1048                 cat_read(&psi, &psi_asic, reg, data);
1049                 break;
1050         case VOYAGER_PSI_WRITE:
1051                 cat_write(&psi, &psi_asic, reg, *data);
1052                 break;
1053         case VOYAGER_PSI_SUBREAD:
1054                 cat_subread(&psi, &psi_asic, reg, 1, data);
1055                 break;
1056         case VOYAGER_PSI_SUBWRITE:
1057                 cat_subwrite(&psi, &psi_asic, reg, 1, data);
1058                 break;
1059         default:
1060                 printk(KERN_ERR "Voyager PSI, unrecognised command %d\n", cmd);
1061                 break;
1062         }
1063         outb(VOYAGER_CAT_END, CAT_CMD);
1064 }
1065
1066 void voyager_cat_do_common_interrupt(void)
1067 {
1068         /* This is caused either by a memory parity error or something
1069          * in the PSI */
1070         __u8 data;
1071         voyager_module_t psi = { 0 };
1072         voyager_asic_t psi_asic = { 0 };
1073         struct voyager_psi psi_reg;
1074         int i;
1075       re_read:
1076         psi.asic = &psi_asic;
1077         psi.asic->asic_id = VOYAGER_CAT_ID;
1078         psi.asic->subaddr = VOYAGER_SUBADDR_HI;
1079         psi.module_addr = VOYAGER_PSI;
1080         psi.scan_path_connected = 0;
1081
1082         outb(VOYAGER_CAT_END, CAT_CMD);
1083         /* Connect the PSI to the CAT Bus */
1084         outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
1085         outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
1086         outb(VOYAGER_CAT_RUN, CAT_CMD);
1087         cat_disconnect(&psi, &psi_asic);
1088         /* Read the status.  NOTE: Need to read *all* the PSI regs here
1089          * otherwise the cmn int will be reasserted */
1090         for (i = 0; i < sizeof(psi_reg.regs); i++) {
1091                 cat_read(&psi, &psi_asic, i, &((__u8 *) & psi_reg.regs)[i]);
1092         }
1093         outb(VOYAGER_CAT_END, CAT_CMD);
1094         if ((psi_reg.regs.checkbit & 0x02) == 0) {
1095                 psi_reg.regs.checkbit |= 0x02;
1096                 cat_write(&psi, &psi_asic, 5, psi_reg.regs.checkbit);
1097                 printk("VOYAGER RE-READ PSI\n");
1098                 goto re_read;
1099         }
1100         outb(VOYAGER_CAT_RUN, CAT_CMD);
1101         for (i = 0; i < sizeof(psi_reg.subregs); i++) {
1102                 /* This looks strange, but the PSI doesn't do auto increment
1103                  * correctly */
1104                 cat_subread(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG + i,
1105                             1, &((__u8 *) & psi_reg.subregs)[i]);
1106         }
1107         outb(VOYAGER_CAT_END, CAT_CMD);
1108 #ifdef VOYAGER_CAT_DEBUG
1109         printk("VOYAGER PSI: ");
1110         for (i = 0; i < sizeof(psi_reg.regs); i++)
1111                 printk("%02x ", ((__u8 *) & psi_reg.regs)[i]);
1112         printk("\n           ");
1113         for (i = 0; i < sizeof(psi_reg.subregs); i++)
1114                 printk("%02x ", ((__u8 *) & psi_reg.subregs)[i]);
1115         printk("\n");
1116 #endif
1117         if (psi_reg.regs.intstatus & PSI_MON) {
1118                 /* switch off or power fail */
1119
1120                 if (psi_reg.subregs.supply & PSI_SWITCH_OFF) {
1121                         if (voyager_status.switch_off) {
1122                                 printk(KERN_ERR
1123                                        "Voyager front panel switch turned off again---Immediate power off!\n");
1124                                 voyager_cat_power_off();
1125                                 /* not reached */
1126                         } else {
1127                                 printk(KERN_ERR
1128                                        "Voyager front panel switch turned off\n");
1129                                 voyager_status.switch_off = 1;
1130                                 voyager_status.request_from_kernel = 1;
1131                                 wake_up_process(voyager_thread);
1132                         }
1133                         /* Tell the hardware we're taking care of the
1134                          * shutdown, otherwise it will power the box off
1135                          * within 3 seconds of the switch being pressed and,
1136                          * which is much more important to us, continue to
1137                          * assert the common interrupt */
1138                         data = PSI_CLR_SWITCH_OFF;
1139                         outb(VOYAGER_CAT_RUN, CAT_CMD);
1140                         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG,
1141                                      1, &data);
1142                         outb(VOYAGER_CAT_END, CAT_CMD);
1143                 } else {
1144
1145                         VDEBUG(("Voyager ac fail reg 0x%x\n",
1146                                 psi_reg.subregs.ACfail));
1147                         if ((psi_reg.subregs.ACfail & AC_FAIL_STAT_CHANGE) == 0) {
1148                                 /* No further update */
1149                                 return;
1150                         }
1151 #if 0
1152                         /* Don't bother trying to find out who failed.
1153                          * FIXME: This probably makes the code incorrect on
1154                          * anything other than a 345x */
1155                         for (i = 0; i < 5; i++) {
1156                                 if (psi_reg.subregs.ACfail & (1 << i)) {
1157                                         break;
1158                                 }
1159                         }
1160                         printk(KERN_NOTICE "AC FAIL IN SUPPLY %d\n", i);
1161 #endif
1162                         /* DON'T do this: it shuts down the AC PSI
1163                            outb(VOYAGER_CAT_RUN, CAT_CMD);
1164                            data = PSI_MASK_MASK | i;
1165                            cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_MASK,
1166                            1, &data);
1167                            outb(VOYAGER_CAT_END, CAT_CMD);
1168                          */
1169                         printk(KERN_ERR "Voyager AC power failure\n");
1170                         outb(VOYAGER_CAT_RUN, CAT_CMD);
1171                         data = PSI_COLD_START;
1172                         cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG,
1173                                      1, &data);
1174                         outb(VOYAGER_CAT_END, CAT_CMD);
1175                         voyager_status.power_fail = 1;
1176                         voyager_status.request_from_kernel = 1;
1177                         wake_up_process(voyager_thread);
1178                 }
1179
1180         } else if (psi_reg.regs.intstatus & PSI_FAULT) {
1181                 /* Major fault! */
1182                 printk(KERN_ERR
1183                        "Voyager PSI Detected major fault, immediate power off!\n");
1184                 voyager_cat_power_off();
1185                 /* not reached */
1186         } else if (psi_reg.regs.intstatus & (PSI_DC_FAIL | PSI_ALARM
1187                                              | PSI_CURRENT | PSI_DVM
1188                                              | PSI_PSCFAULT | PSI_STAT_CHG)) {
1189                 /* other psi fault */
1190
1191                 printk(KERN_WARNING "Voyager PSI status 0x%x\n", data);
1192                 /* clear the PSI fault */
1193                 outb(VOYAGER_CAT_RUN, CAT_CMD);
1194                 cat_write(&psi, &psi_asic, VOYAGER_PSI_STATUS_REG, 0);
1195                 outb(VOYAGER_CAT_END, CAT_CMD);
1196         }
1197 }