drivers/char/rio/rioinit.c

   1 /*
   2 ** -----------------------------------------------------------------------------
   3 **
   4 **  Perle Specialix driver for Linux
   5 **  Ported from existing RIO Driver for SCO sources.
   6  *
   7  *  (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
   8  *
   9  *      This program is free software; you can redistribute it and/or modify
  10  *      it under the terms of the GNU General Public License as published by
  11  *      the Free Software Foundation; either version 2 of the License, or
  12  *      (at your option) any later version.
  13  *
  14  *      This program is distributed in the hope that it will be useful,
  15  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *      GNU General Public License for more details.
  18  *
  19  *      You should have received a copy of the GNU General Public License
  20  *      along with this program; if not, write to the Free Software
  21  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 **
  23 **      Module          : rioinit.c
  24 **      SID             : 1.3
  25 **      Last Modified   : 11/6/98 10:33:43
  26 **      Retrieved       : 11/6/98 10:33:49
  27 **
  28 **  ident @(#)rioinit.c 1.3
  29 **
  30 ** -----------------------------------------------------------------------------
  31 */
  32 #ifdef SCCS_LABELS
  33 static char *_rioinit_c_sccs_ = "@(#)rioinit.c  1.3";
  34 #endif
  35
  36 #include <linux/module.h>
  37 #include <linux/slab.h>
  38 #include <linux/errno.h>
  39 #include <linux/delay.h>
  40 #include <asm/io.h>
  41 #include <asm/system.h>
  42 #include <asm/string.h>
  43 #include <asm/semaphore.h>
  44 #include <asm/uaccess.h>
  45
  46 #include <linux/termios.h>
  47 #include <linux/serial.h>
  48
  49 #include <linux/generic_serial.h>
  50
  51
  52 #include "linux_compat.h"
  53 #include "pkt.h"
  54 #include "daemon.h"
  55 #include "rio.h"
  56 #include "riospace.h"
  57 #include "cmdpkt.h"
  58 #include "map.h"
  59 #include "rup.h"
  60 #include "port.h"
  61 #include "riodrvr.h"
  62 #include "rioinfo.h"
  63 #include "func.h"
  64 #include "errors.h"
  65 #include "pci.h"
  66
  67 #include "parmmap.h"
  68 #include "unixrup.h"
  69 #include "board.h"
  70 #include "host.h"
  71 #include "phb.h"
  72 #include "link.h"
  73 #include "cmdblk.h"
  74 #include "route.h"
  75 #include "cirrus.h"
  76 #include "rioioctl.h"
  77 #include "rio_linux.h"
  78
  79 int RIOPCIinit(struct rio_info *p, int Mode);
  80
  81 static int RIOScrub(int, u8 __iomem *, int);
  82
  83
  84 /**
  85 ** RIOAssignAT :
  86 **
  87 ** Fill out the fields in the p->RIOHosts structure now we know we know
  88 ** we have a board present.
  89 **
  90 ** bits < 0 indicates 8 bit operation requested,
  91 ** bits > 0 indicates 16 bit operation.
  92 */
  93
  94 int RIOAssignAT(struct rio_info *p, int Base, void __iomem *virtAddr, int mode)
  95 {
  96         int             bits;
  97         struct DpRam __iomem *cardp = (struct DpRam __iomem *)virtAddr;
  98
  99         if ((Base < ONE_MEG) || (mode & BYTE_ACCESS_MODE))
 100                 bits = BYTE_OPERATION;
 101         else
 102                 bits = WORD_OPERATION;
 103
 104         /*
 105         ** Board has passed its scrub test. Fill in all the
 106         ** transient stuff.
 107         */
 108         p->RIOHosts[p->RIONumHosts].Caddr       = virtAddr;
 109         p->RIOHosts[p->RIONumHosts].CardP       = virtAddr;
 110
 111         /*
 112         ** Revision 01 AT host cards don't support WORD operations,
 113         */
 114         if (readb(&cardp->DpRevision) == 01)
 115                 bits = BYTE_OPERATION;
 116
 117         p->RIOHosts[p->RIONumHosts].Type = RIO_AT;
 118         p->RIOHosts[p->RIONumHosts].Copy = rio_copy_to_card;
 119                                                                                         /* set this later */
 120         p->RIOHosts[p->RIONumHosts].Slot = -1;
 121         p->RIOHosts[p->RIONumHosts].Mode = SLOW_LINKS | SLOW_AT_BUS | bits;
 122         writeb(BOOT_FROM_RAM | EXTERNAL_BUS_OFF | p->RIOHosts[p->RIONumHosts].Mode | INTERRUPT_DISABLE ,
 123                 &p->RIOHosts[p->RIONumHosts].Control);
 124         writeb(0xFF, &p->RIOHosts[p->RIONumHosts].ResetInt);
 125         writeb(BOOT_FROM_RAM | EXTERNAL_BUS_OFF | p->RIOHosts[p->RIONumHosts].Mode | INTERRUPT_DISABLE,
 126                 &p->RIOHosts[p->RIONumHosts].Control);
 127         writeb(0xFF, &p->RIOHosts[p->RIONumHosts].ResetInt);
 128         p->RIOHosts[p->RIONumHosts].UniqueNum =
 129                 ((readb(&p->RIOHosts[p->RIONumHosts].Unique[0])&0xFF)<<0)|
 130                 ((readb(&p->RIOHosts[p->RIONumHosts].Unique[1])&0xFF)<<8)|
 131                 ((readb(&p->RIOHosts[p->RIONumHosts].Unique[2])&0xFF)<<16)|
 132                 ((readb(&p->RIOHosts[p->RIONumHosts].Unique[3])&0xFF)<<24);
 133         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Uniquenum 0x%x\n",p->RIOHosts[p->RIONumHosts].UniqueNum);
 134
 135         p->RIONumHosts++;
 136         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Tests Passed at 0x%x\n", Base);
 137         return(1);
 138 }
 139
 140 static  u8      val[] = {
 141 #ifdef VERY_LONG_TEST
 142           0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80,
 143           0xa5, 0xff, 0x5a, 0x00, 0xff, 0xc9, 0x36,
 144 #endif
 145           0xff, 0x00, 0x00 };
 146
 147 #define TEST_END sizeof(val)
 148
 149 /*
 150 ** RAM test a board.
 151 ** Nothing too complicated, just enough to check it out.
 152 */
 153 int RIOBoardTest(unsigned long paddr, void __iomem *caddr, unsigned char type, int slot)
 154 {
 155         struct DpRam __iomem *DpRam = caddr;
 156         void __iomem *ram[4];
 157         int  size[4];
 158         int  op, bank;
 159         int  nbanks;
 160
 161         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Reset host type=%d, DpRam=%p, slot=%d\n",
 162                         type, DpRam, slot);
 163
 164         RIOHostReset(type, DpRam, slot);
 165
 166         /*
 167         ** Scrub the memory. This comes in several banks:
 168         ** DPsram1      - 7000h bytes
 169         ** DPsram2      - 200h  bytes
 170         ** DPsram3      - 7000h bytes
 171         ** scratch      - 1000h bytes
 172         */
 173
 174         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Setup ram/size arrays\n");
 175
 176         size[0] = DP_SRAM1_SIZE;
 177         size[1] = DP_SRAM2_SIZE;
 178         size[2] = DP_SRAM3_SIZE;
 179         size[3] = DP_SCRATCH_SIZE;
 180
 181         ram[0] = DpRam->DpSram1;
 182         ram[1] = DpRam->DpSram2;
 183         ram[2] = DpRam->DpSram3;
 184         nbanks = (type == RIO_PCI) ? 3 : 4;
 185         if (nbanks == 4)
 186                 ram[3] = DpRam->DpScratch;
 187
 188
 189         if (nbanks == 3) {
 190                 rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Memory: %p(0x%x), %p(0x%x), %p(0x%x)\n",
 191                                 ram[0], size[0], ram[1], size[1], ram[2], size[2]);
 192         } else {
 193                 rio_dprintk (RIO_DEBUG_INIT, "RIO-init: %p(0x%x), %p(0x%x), %p(0x%x), %p(0x%x)\n",
 194                                 ram[0], size[0], ram[1], size[1], ram[2], size[2], ram[3], size[3]);
 195         }
 196
 197         /*
 198         ** This scrub operation will test for crosstalk between
 199         ** banks. TEST_END is a magic number, and relates to the offset
 200         ** within the 'val' array used by Scrub.
 201         */
 202         for (op=0; op<TEST_END; op++) {
 203                 for (bank=0; bank<nbanks; bank++) {
 204                         if (RIOScrub(op, ram[bank], size[bank]) == RIO_FAIL) {
 205                                 rio_dprintk (RIO_DEBUG_INIT, "RIO-init: RIOScrub band %d, op %d failed\n",
 206                                                         bank, op);
 207                                 return RIO_FAIL;
 208                         }
 209                 }
 210         }
 211
 212         rio_dprintk (RIO_DEBUG_INIT, "Test completed\n");
 213         return 0;
 214 }
 215
 216
 217 /*
 218 ** Scrub an area of RAM.
 219 ** Define PRETEST and POSTTEST for a more thorough checking of the
 220 ** state of the memory.
 221 ** Call with op set to an index into the above 'val' array to determine
 222 ** which value will be written into memory.
 223 ** Call with op set to zero means that the RAM will not be read and checked
 224 ** before it is written.
 225 ** Call with op not zero, and the RAM will be read and compated with val[op-1]
 226 ** to check that the data from the previous phase was retained.
 227 */
 228
 229 static int RIOScrub(int op, u8 __iomem *ram, int size)
 230 {
 231         int off;
 232         unsigned char   oldbyte;
 233         unsigned char   newbyte;
 234         unsigned char   invbyte;
 235         unsigned short  oldword;
 236         unsigned short  newword;
 237         unsigned short  invword;
 238         unsigned short  swapword;
 239
 240         if (op) {
 241                 oldbyte = val[op-1];
 242                 oldword = oldbyte | (oldbyte<<8);
 243         } else
 244           oldbyte = oldword = 0; /* Tell the compiler we've initilalized them. */
 245         newbyte = val[op];
 246         newword = newbyte | (newbyte<<8);
 247         invbyte = ~newbyte;
 248         invword = invbyte | (invbyte<<8);
 249
 250         /*
 251         ** Check that the RAM contains the value that should have been left there
 252         ** by the previous test (not applicable for pass zero)
 253         */
 254         if (op) {
 255                 for (off=0; off<size; off++) {
 256                         if (readb(ram + off) != oldbyte) {
 257                                 rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Byte Pre Check 1: BYTE at offset 0x%x should have been=%x, was=%x\n", off, oldbyte, readb(ram + off));
 258                                 return RIO_FAIL;
 259                         }
 260                 }
 261                 for (off=0; off<size; off+=2) {
 262                         if (readw(ram + off) != oldword) {
 263                                 rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Word Pre Check: WORD at offset 0x%x should have been=%x, was=%x\n",off,oldword, readw(ram + off));
 264                                 rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Word Pre Check: BYTE at offset 0x%x is %x BYTE at offset 0x%x is %x\n", off, readb(ram + off), off+1, readb(ram+off+1));
 265                                 return RIO_FAIL;
 266                         }
 267                 }
 268         }
 269
 270         /*
 271         ** Now write the INVERSE of the test data into every location, using
 272         ** BYTE write operations, first checking before each byte is written
 273         ** that the location contains the old value still, and checking after
 274         ** the write that the location contains the data specified - this is
 275         ** the BYTE read/write test.
 276         */
 277         for (off=0; off<size; off++) {
 278                 if (op && (readb(ram + off) != oldbyte)) {
 279                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Byte Pre Check 2: BYTE at offset 0x%x should have been=%x, was=%x\n", off, oldbyte, readb(ram + off));
 280                         return RIO_FAIL;
 281                 }
 282                 writeb(invbyte, ram + off);
 283                 if (readb(ram + off) != invbyte) {
 284                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Byte Inv Check: BYTE at offset 0x%x should have been=%x, was=%x\n", off, invbyte, readb(ram + off));
 285                         return RIO_FAIL;
 286                 }
 287         }
 288
 289         /*
 290         ** now, use WORD operations to write the test value into every location,
 291         ** check as before that the location contains the previous test value
 292         ** before overwriting, and that it contains the data value written
 293         ** afterwards.
 294         ** This is the WORD operation test.
 295         */
 296         for (off=0; off<size; off+=2) {
 297                 if (readw(ram + off) != invword) {
 298                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Word Inv Check: WORD at offset 0x%x should have been=%x, was=%x\n", off, invword, readw(ram + off));
 299                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Word Inv Check: BYTE at offset 0x%x is %x BYTE at offset 0x%x is %x\n", off, readb(ram + off), off+1, readb(ram+off+1));
 300                         return RIO_FAIL;
 301                 }
 302
 303                 writew(newword, ram + off);
 304                 if ( readw(ram + off) != newword ) {
 305                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Post Word Check 1: WORD at offset 0x%x should have been=%x, was=%x\n", off, newword, readw(ram + off));
 306                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Post Word Check 1: BYTE at offset 0x%x is %x BYTE at offset 0x%x is %x\n", off, readb(ram + off), off+1, readb(ram + off + 1));
 307                         return RIO_FAIL;
 308                 }
 309         }
 310
 311         /*
 312         ** now run through the block of memory again, first in byte mode
 313         ** then in word mode, and check that all the locations contain the
 314         ** required test data.
 315         */
 316         for (off=0; off<size; off++) {
 317                 if (readb(ram + off) != newbyte) {
 318                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Post Byte Check: BYTE at offset 0x%x should have been=%x, was=%x\n", off, newbyte, readb(ram + off));
 319                         return RIO_FAIL;
 320                 }
 321         }
 322
 323         for (off=0; off<size; off+=2) {
 324                 if (readw(ram + off) != newword ) {
 325                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Post Word Check 2: WORD at offset 0x%x should have been=%x, was=%x\n", off, newword, readw(ram + off));
 326                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: Post Word Check 2: BYTE at offset 0x%x is %x BYTE at offset 0x%x is %x\n", off, readb(ram + off), off+1, readb(ram + off + 1));
 327                         return RIO_FAIL;
 328                 }
 329         }
 330
 331         /*
 332         ** time to check out byte swapping errors
 333         */
 334         swapword = invbyte | (newbyte << 8);
 335
 336         for (off=0; off<size; off+=2) {
 337                 writeb(invbyte, &ram[off]);
 338                 writeb(newbyte, &ram[off+1]);
 339         }
 340
 341         for ( off=0; off<size; off+=2 ) {
 342                 if (readw(ram + off) != swapword) {
 343                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: SwapWord Check 1: WORD at offset 0x%x should have been=%x, was=%x\n", off, swapword, readw(ram + off));
 344                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: SwapWord Check 1: BYTE at offset 0x%x is %x BYTE at offset 0x%x is %x\n", off, readb(ram + off), off+1, readb(ram + off + 1));
 345                         return RIO_FAIL;
 346                 }
 347                 writew(~swapword, ram + off);
 348         }
 349
 350         for (off=0; off<size; off+=2) {
 351                 if (readb(ram + off) != newbyte) {
 352                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: SwapWord Check 2: BYTE at offset 0x%x should have been=%x, was=%x\n", off, newbyte, readb(ram + off));
 353                         return RIO_FAIL;
 354                 }
 355                 if (readb(ram + off + 1) != invbyte) {
 356                         rio_dprintk (RIO_DEBUG_INIT, "RIO-init: SwapWord Check 2: BYTE at offset 0x%x should have been=%x, was=%x\n", off+1, invbyte, readb(ram + off + 1));
 357                         return RIO_FAIL;
 358                 }
 359                 writew(newword, ram + off);
 360         }
 361         return 0;
 362 }
 363
 364
 365 int RIODefaultName(struct rio_info *p, struct Host *HostP, unsigned int UnitId)
 366 {
 367         memcpy(HostP->Mapping[UnitId].Name, "UNKNOWN RTA X-XX", 17);
 368         HostP->Mapping[UnitId].Name[12]='1'+(HostP-p->RIOHosts);
 369         if ((UnitId+1) > 9) {
 370                 HostP->Mapping[UnitId].Name[14]='0'+((UnitId+1)/10);
 371                 HostP->Mapping[UnitId].Name[15]='0'+((UnitId+1)%10);
 372         }
 373         else {
 374                 HostP->Mapping[UnitId].Name[14]='1'+UnitId;
 375                 HostP->Mapping[UnitId].Name[15]=0;
 376         }
 377         return 0;
 378 }
 379
 380 #define RIO_RELEASE     "Linux"
 381 #define RELEASE_ID      "1.0"
 382
 383 static struct rioVersion        stVersion;
 384
 385 struct rioVersion *RIOVersid(void)
 386 {
 387     strlcpy(stVersion.version, "RIO driver for linux V1.0",
 388             sizeof(stVersion.version));
 389     strlcpy(stVersion.buildDate, __DATE__,
 390             sizeof(stVersion.buildDate));
 391
 392     return &stVersion;
 393 }
 394
 395 void RIOHostReset(unsigned int Type, struct DpRam __iomem *DpRamP, unsigned int Slot)
 396 {
 397         /*
 398         ** Reset the Tpu
 399         */
 400         rio_dprintk (RIO_DEBUG_INIT,  "RIOHostReset: type 0x%x", Type);
 401         switch ( Type ) {
 402         case RIO_AT:
 403                 rio_dprintk (RIO_DEBUG_INIT, " (RIO_AT)\n");
 404                 writeb(BOOT_FROM_RAM | EXTERNAL_BUS_OFF | INTERRUPT_DISABLE | BYTE_OPERATION |
 405                         SLOW_LINKS | SLOW_AT_BUS, &DpRamP->DpControl);
 406                 writeb(0xFF, &DpRamP->DpResetTpu);
 407                 udelay(3);
 408                         rio_dprintk (RIO_DEBUG_INIT,  "RIOHostReset: Don't know if it worked. Try reset again\n");
 409                 writeb(BOOT_FROM_RAM | EXTERNAL_BUS_OFF | INTERRUPT_DISABLE |
 410                         BYTE_OPERATION | SLOW_LINKS | SLOW_AT_BUS, &DpRamP->DpControl);
 411                 writeb(0xFF, &DpRamP->DpResetTpu);
 412                 udelay(3);
 413                 break;
 414         case RIO_PCI:
 415                 rio_dprintk (RIO_DEBUG_INIT, " (RIO_PCI)\n");
 416                 writeb(RIO_PCI_BOOT_FROM_RAM, &DpRamP->DpControl);
 417                 writeb(0xFF, &DpRamP->DpResetInt);
 418                 writeb(0xFF, &DpRamP->DpResetTpu);
 419                 udelay(100);
 420                 break;
 421         default:
 422                 rio_dprintk (RIO_DEBUG_INIT, " (UNKNOWN)\n");
 423                 break;
 424         }
 425         return;
 426 }