common/cmd_scsi.c

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  *
  23  *
  24  *
  25  */
  26
  27 /*
  28  * SCSI support.
  29  */
  30 #include <common.h>
  31 #include <command.h>
  32 #include <asm/processor.h>
  33 #include <scsi.h>
  34 #include <image.h>
  35 #include <pci.h>
  36
  37 #if (CONFIG_COMMANDS & CFG_CMD_SCSI)
  38
  39 #ifdef CONFIG_SCSI_SYM53C8XX
  40 #define SCSI_VEND_ID    0x1000
  41 #ifndef CONFIG_SCSI_DEV_ID
  42 #define SCSI_DEV_ID             0x0001
  43 #else
  44 #define SCSI_DEV_ID             CONFIG_SCSI_DEV_ID
  45 #endif
  46 #else
  47 #error CONFIG_SCSI_SYM53C8XX must be defined
  48 #endif
  49
  50
  51 static ccb tempccb;     /* temporary scsi command buffer */
  52
  53 static unsigned char tempbuff[512]; /* temporary data buffer */
  54
  55 static int scsi_max_devs; /* number of highest available scsi device */
  56
  57 static int scsi_curr_dev; /* current device */
  58
  59 static block_dev_desc_t scsi_dev_desc[CFG_SCSI_MAX_DEVICE];
  60
  61 /********************************************************************************
  62  *  forward declerations of some Setup Routines
  63  */
  64 void scsi_setup_test_unit_ready(ccb * pccb);
  65 void scsi_setup_read_capacity(ccb * pccb);
  66 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks);
  67 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks);
  68 void scsi_setup_inquiry(ccb * pccb);
  69 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len);
  70
  71
  72 ulong scsi_read(int device, ulong blknr, ulong blkcnt, ulong *buffer);
  73
  74
  75 /*********************************************************************************
  76  * (re)-scan the scsi bus and reports scsi device info
  77  * to the user if mode = 1
  78  */
  79 void scsi_scan(int mode)
  80 {
  81         unsigned char i,perq,modi,lun;
  82         unsigned long capacity,blksz;
  83         ccb* pccb=(ccb *)&tempccb;
  84
  85         if(mode==1) {
  86                 printf("scanning bus for devices...\n");
  87         }
  88         for(i=0;i<CFG_SCSI_MAX_DEVICE;i++) {
  89                 scsi_dev_desc[i].target=0xff;
  90                 scsi_dev_desc[i].lun=0xff;
  91                 scsi_dev_desc[i].lba=0;
  92                 scsi_dev_desc[i].blksz=0;
  93                 scsi_dev_desc[i].type=DEV_TYPE_UNKNOWN;
  94                 scsi_dev_desc[i].vendor[0]=0;
  95                 scsi_dev_desc[i].product[0]=0;
  96                 scsi_dev_desc[i].revision[0]=0;
  97                 scsi_dev_desc[i].removable=FALSE;
  98                 scsi_dev_desc[i].if_type=IF_TYPE_SCSI;
  99                 scsi_dev_desc[i].dev=i;
 100                 scsi_dev_desc[i].part_type=PART_TYPE_UNKNOWN;
 101                 scsi_dev_desc[i].block_read=scsi_read;
 102         }
 103         scsi_max_devs=0;
 104         for(i=0;i<CFG_SCSI_MAX_SCSI_ID;i++) {
 105                 pccb->target=i;
 106                 for(lun=0;lun<CFG_SCSI_MAX_LUN;lun++) {
 107                         pccb->lun=lun;
 108                         pccb->pdata=(unsigned char *)&tempbuff;
 109                         pccb->datalen=512;
 110                         scsi_setup_inquiry(pccb);
 111                         if(scsi_exec(pccb)!=TRUE) {
 112                                 if(pccb->contr_stat==SCSI_SEL_TIME_OUT) {
 113                                         debug ("Selection timeout ID %d\n",pccb->target);
 114                                         continue; /* selection timeout => assuming no device present */
 115                                 }
 116                                 scsi_print_error(pccb);
 117                                 continue;
 118                         }
 119                         perq=tempbuff[0];
 120                         modi=tempbuff[1];
 121                         if((perq & 0x1f)==0x1f) {
 122                                 continue; /* skip unknown devices */
 123                         }
 124                         if((modi&0x80)==0x80) /* drive is removable */
 125                                 scsi_dev_desc[scsi_max_devs].removable=TRUE;
 126                         /* get info for this device */
 127                         scsi_ident_cpy(&scsi_dev_desc[scsi_max_devs].vendor[0],&tempbuff[8],8);
 128                         scsi_ident_cpy(&scsi_dev_desc[scsi_max_devs].product[0],&tempbuff[16],16);
 129                         scsi_ident_cpy(&scsi_dev_desc[scsi_max_devs].revision[0],&tempbuff[32],4);
 130                         scsi_dev_desc[scsi_max_devs].target=pccb->target;
 131                         scsi_dev_desc[scsi_max_devs].lun=pccb->lun;
 132
 133                         pccb->datalen=0;
 134                         scsi_setup_test_unit_ready(pccb);
 135                         if(scsi_exec(pccb)!=TRUE) {
 136                                 if(scsi_dev_desc[scsi_max_devs].removable==TRUE) {
 137                                         scsi_dev_desc[scsi_max_devs].type=perq;
 138                                         goto removable;
 139                                 }
 140                                 scsi_print_error(pccb);
 141                                 continue;
 142                         }
 143                         pccb->datalen=8;
 144                         scsi_setup_read_capacity(pccb);
 145                         if(scsi_exec(pccb)!=TRUE) {
 146                                 scsi_print_error(pccb);
 147                                 continue;
 148                         }
 149                         capacity=((unsigned long)tempbuff[0]<<24)|((unsigned long)tempbuff[1]<<16)|
 150                                         ((unsigned long)tempbuff[2]<<8)|((unsigned long)tempbuff[3]);
 151                         blksz=((unsigned long)tempbuff[4]<<24)|((unsigned long)tempbuff[5]<<16)|
 152                                 ((unsigned long)tempbuff[6]<<8)|((unsigned long)tempbuff[7]);
 153                         scsi_dev_desc[scsi_max_devs].lba=capacity;
 154                         scsi_dev_desc[scsi_max_devs].blksz=blksz;
 155                         scsi_dev_desc[scsi_max_devs].type=perq;
 156                         init_part(&scsi_dev_desc[scsi_max_devs]);
 157 removable:
 158                         if(mode==1) {
 159                                 printf ("  Device %d: ", scsi_max_devs);
 160                                 dev_print(&scsi_dev_desc[scsi_max_devs]);
 161                         } /* if mode */
 162                         scsi_max_devs++;
 163                 } /* next LUN */
 164         }
 165         if(scsi_max_devs>0)
 166                 scsi_curr_dev=0;
 167         else
 168                 scsi_curr_dev=-1;
 169 }
 170
 171
 172 void scsi_init(void)
 173 {
 174         int busdevfunc;
 175
 176         busdevfunc=pci_find_device(SCSI_VEND_ID,SCSI_DEV_ID,0); /* get PCI Device ID */
 177         if(busdevfunc==-1) {
 178                 printf("Error SCSI Controller (%04X,%04X) not found\n",SCSI_VEND_ID,SCSI_DEV_ID);
 179                 return;
 180         }
 181 #ifdef DEBUG
 182         else {
 183                 printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",SCSI_VEND_ID,SCSI_DEV_ID,(busdevfunc>>16)&0xFF,(busdevfunc>>11)&0x1F,(busdevfunc>>8)&0x7);
 184         }
 185 #endif
 186         scsi_low_level_init(busdevfunc);
 187         scsi_scan(1);
 188 }
 189
 190 block_dev_desc_t * scsi_get_dev(int dev)
 191 {
 192         return((block_dev_desc_t *)&scsi_dev_desc[dev]);
 193 }
 194
 195
 196 /******************************************************************************
 197  * scsi boot command intepreter. Derived from diskboot
 198  */
 199 int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 200 {
 201         char *boot_device = NULL;
 202         char *ep;
 203         int dev, part = 0;
 204         ulong addr, cnt, checksum;
 205         disk_partition_t info;
 206         image_header_t *hdr;
 207         int rcode = 0;
 208
 209         switch (argc) {
 210         case 1:
 211                 addr = CFG_LOAD_ADDR;
 212                 boot_device = getenv ("bootdevice");
 213                 break;
 214         case 2:
 215                 addr = simple_strtoul(argv[1], NULL, 16);
 216                 boot_device = getenv ("bootdevice");
 217                 break;
 218         case 3:
 219                 addr = simple_strtoul(argv[1], NULL, 16);
 220                 boot_device = argv[2];
 221                 break;
 222         default:
 223                 printf ("Usage:\n%s\n", cmdtp->usage);
 224                 return 1;
 225         }
 226
 227         if (!boot_device) {
 228                 puts ("\n** No boot device **\n");
 229                 return 1;
 230         }
 231
 232         dev = simple_strtoul(boot_device, &ep, 16);
 233         printf("booting from dev %d\n",dev);
 234         if (scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
 235                 printf ("\n** Device %d not available\n", dev);
 236                 return 1;
 237         }
 238
 239         if (*ep) {
 240                 if (*ep != ':') {
 241                         puts ("\n** Invalid boot device, use `dev[:part]' **\n");
 242                         return 1;
 243                 }
 244                 part = simple_strtoul(++ep, NULL, 16);
 245         }
 246         if (get_partition_info (&scsi_dev_desc[dev], part, &info)) {
 247                 printf("error reading partinfo\n");
 248                 return 1;
 249         }
 250         if ((strncmp(info.type, BOOT_PART_TYPE, sizeof(info.type)) != 0) &&
 251             (strncmp(info.type, BOOT_PART_COMP, sizeof(info.type)) != 0)) {
 252                 printf ("\n** Invalid partition type \"%.32s\""
 253                         " (expect \"" BOOT_PART_TYPE "\")\n",
 254                         info.type);
 255                 return 1;
 256         }
 257
 258         printf ("\nLoading from SCSI device %d, partition %d: "
 259                 "Name: %.32s  Type: %.32s\n",
 260                 dev, part, info.name, info.type);
 261
 262         debug ("First Block: %ld,  # of blocks: %ld, Block Size: %ld\n",
 263                 info.start, info.size, info.blksz);
 264
 265         if (scsi_read (dev, info.start, 1, (ulong *)addr) != 1) {
 266                 printf ("** Read error on %d:%d\n", dev, part);
 267                 return 1;
 268         }
 269
 270         hdr = (image_header_t *)addr;
 271
 272         if (hdr->ih_magic == IH_MAGIC) {
 273                 printf("\n** Bad Magic Number **\n");
 274                 return 1;
 275         }
 276
 277         checksum = ntohl(hdr->ih_hcrc);
 278         hdr->ih_hcrc = 0;
 279
 280         if (crc32 (0, (char *)hdr, sizeof(image_header_t)) != checksum) {
 281                 puts ("\n** Bad Header Checksum **\n");
 282                 return 1;
 283         }
 284
 285         print_image_hdr (hdr);
 286         cnt = (hdr->ih_size + sizeof(image_header_t));
 287         cnt += info.blksz - 1;
 288         cnt /= info.blksz;
 289         cnt -= 1;
 290
 291         if (scsi_read (dev, info.start+1, cnt,
 292                       (ulong *)(addr+info.blksz)) != cnt) {
 293                 printf ("** Read error on %d:%d\n", dev, part);
 294                 return 1;
 295         }
 296         /* Loading ok, update default load address */
 297         load_addr = addr;
 298
 299         flush_cache (addr, (cnt+1)*info.blksz);
 300
 301         /* Check if we should attempt an auto-start */
 302         if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
 303                 char *local_args[2];
 304                 extern int do_bootm (cmd_tbl_t *, int, int, char *[]);
 305                 local_args[0] = argv[0];
 306                 local_args[1] = NULL;
 307                 printf ("Automatic boot of image at addr 0x%08lX ...\n", addr);
 308                 rcode = do_bootm (cmdtp, 0, 1, local_args);
 309         }
 310          return rcode;
 311 }
 312
 313 /*********************************************************************************
 314  * scsi command intepreter
 315  */
 316 int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 317 {
 318         switch (argc) {
 319     case 0:
 320     case 1:     printf ("Usage:\n%s\n", cmdtp->usage);  return 1;
 321     case 2:
 322                         if (strncmp(argv[1],"res",3) == 0) {
 323                                 printf("\nReset SCSI\n");
 324                                 scsi_bus_reset();
 325                                 scsi_scan(1);
 326                                 return 0;
 327                         }
 328                         if (strncmp(argv[1],"inf",3) == 0) {
 329                                 int i;
 330                                 for (i=0; i<CFG_SCSI_MAX_DEVICE; ++i) {
 331                                         if(scsi_dev_desc[i].type==DEV_TYPE_UNKNOWN)
 332                                                 continue; /* list only known devices */
 333                                         printf ("SCSI dev. %d:  ", i);
 334                                         dev_print(&scsi_dev_desc[i]);
 335                                 }
 336                                 return 0;
 337                         }
 338                         if (strncmp(argv[1],"dev",3) == 0) {
 339                                 if ((scsi_curr_dev < 0) || (scsi_curr_dev >= CFG_SCSI_MAX_DEVICE)) {
 340                                         printf("\nno SCSI devices available\n");
 341                                         return 1;
 342                                 }
 343                                 printf ("\n    Device %d: ", scsi_curr_dev);
 344                                 dev_print(&scsi_dev_desc[scsi_curr_dev]);
 345                                 return 0;
 346                         }
 347                         if (strncmp(argv[1],"scan",4) == 0) {
 348                                 scsi_scan(1);
 349                                 return 0;
 350                         }
 351                         if (strncmp(argv[1],"part",4) == 0) {
 352                                 int dev, ok;
 353                                 for (ok=0, dev=0; dev<CFG_SCSI_MAX_DEVICE; ++dev) {
 354                                         if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
 355                                                 ok++;
 356                                                 if (dev)
 357                                                         printf("\n");
 358                                                 debug ("print_part of %x\n",dev);
 359                                                         print_part(&scsi_dev_desc[dev]);
 360                                         }
 361                                 }
 362                                 if (!ok)
 363                                         printf("\nno SCSI devices available\n");
 364                                 return 1;
 365                         }
 366                         printf ("Usage:\n%s\n", cmdtp->usage);
 367                         return 1;
 368         case 3:
 369                         if (strncmp(argv[1],"dev",3) == 0) {
 370                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 371                                 printf ("\nSCSI device %d: ", dev);
 372                                 if (dev >= CFG_SCSI_MAX_DEVICE) {
 373                                         printf("unknown device\n");
 374                                         return 1;
 375                                 }
 376                                 printf ("\n    Device %d: ", dev);
 377                                 dev_print(&scsi_dev_desc[dev]);
 378                                 if(scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
 379                                         return 1;
 380                                 }
 381                                 scsi_curr_dev = dev;
 382                                 printf("... is now current device\n");
 383                                 return 0;
 384                         }
 385                         if (strncmp(argv[1],"part",4) == 0) {
 386                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 387                                 if(scsi_dev_desc[dev].type != DEV_TYPE_UNKNOWN) {
 388                                         print_part(&scsi_dev_desc[dev]);
 389                                 }
 390                                 else {
 391                                         printf ("\nSCSI device %d not available\n", dev);
 392                                 }
 393                                 return 1;
 394                         }
 395                         printf ("Usage:\n%s\n", cmdtp->usage);
 396                         return 1;
 397     default:
 398                         /* at least 4 args */
 399                         if (strcmp(argv[1],"read") == 0) {
 400                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
 401                                 ulong blk  = simple_strtoul(argv[3], NULL, 16);
 402                                 ulong cnt  = simple_strtoul(argv[4], NULL, 16);
 403                                 ulong n;
 404                                 printf ("\nSCSI read: device %d block # %ld, count %ld ... ",
 405                                                 scsi_curr_dev, blk, cnt);
 406                                 n = scsi_read(scsi_curr_dev, blk, cnt, (ulong *)addr);
 407                                 printf ("%ld blocks read: %s\n",n,(n==cnt) ? "OK" : "ERROR");
 408                                 return 0;
 409                         }
 410         } /* switch */
 411         printf ("Usage:\n%s\n", cmdtp->usage);
 412         return 1;
 413 }
 414
 415 /****************************************************************************************
 416  * scsi_read
 417  */
 418
 419 #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
 420
 421 ulong scsi_read(int device, ulong blknr, ulong blkcnt, ulong *buffer)
 422 {
 423         ulong start,blks, buf_addr;
 424         unsigned short smallblks;
 425         ccb* pccb=(ccb *)&tempccb;
 426         device&=0xff;
 427         /* Setup  device
 428          */
 429         pccb->target=scsi_dev_desc[device].target;
 430         pccb->lun=scsi_dev_desc[device].lun;
 431         buf_addr=(unsigned long)buffer;
 432         start=blknr;
 433         blks=blkcnt;
 434         debug ("\nscsi_read: dev %d startblk %lx, blccnt %lx buffer %lx\n",device,start,blks,(unsigned long)buffer);
 435         do {
 436                 pccb->pdata=(unsigned char *)buf_addr;
 437                 if(blks>SCSI_MAX_READ_BLK) {
 438                         pccb->datalen=scsi_dev_desc[device].blksz * SCSI_MAX_READ_BLK;
 439                         smallblks=SCSI_MAX_READ_BLK;
 440                         scsi_setup_read_ext(pccb,start,smallblks);
 441                         start+=SCSI_MAX_READ_BLK;
 442                         blks-=SCSI_MAX_READ_BLK;
 443                 }
 444                 else {
 445                         pccb->datalen=scsi_dev_desc[device].blksz * blks;
 446                         smallblks=(unsigned short) blks;
 447                         scsi_setup_read_ext(pccb,start,smallblks);
 448                         start+=blks;
 449                         blks=0;
 450                 }
 451                 debug ("scsi_read_ext: startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
 452                 if(scsi_exec(pccb)!=TRUE) {
 453                         scsi_print_error(pccb);
 454                         blkcnt-=blks;
 455                         break;
 456                 }
 457                 buf_addr+=pccb->datalen;
 458         } while(blks!=0);
 459         debug ("scsi_read_ext: end startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
 460         return(blkcnt);
 461 }
 462
 463 /* copy src to dest, skipping leading and trailing blanks
 464  * and null terminate the string
 465  */
 466 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len)
 467 {
 468         int start,end;
 469
 470         start=0;
 471         while(start<len) {
 472                 if(src[start]!=' ')
 473                         break;
 474                 start++;
 475         }
 476         end=len-1;
 477         while(end>start) {
 478                 if(src[end]!=' ')
 479                         break;
 480                 end--;
 481         }
 482         for( ; start<=end; start++) {
 483                 *dest++=src[start];
 484         }
 485         *dest='\0';
 486 }
 487
 488
 489 /* Trim trailing blanks, and NUL-terminate string
 490  */
 491 void scsi_trim_trail (unsigned char *str, unsigned int len)
 492 {
 493         unsigned char *p = str + len - 1;
 494
 495         while (len-- > 0) {
 496                 *p-- = '\0';
 497                 if (*p != ' ') {
 498                         return;
 499                 }
 500         }
 501 }
 502
 503
 504 /************************************************************************************
 505  * Some setup (fill-in) routines
 506  */
 507 void scsi_setup_test_unit_ready(ccb * pccb)
 508 {
 509         pccb->cmd[0]=SCSI_TST_U_RDY;
 510         pccb->cmd[1]=pccb->lun<<5;
 511         pccb->cmd[2]=0;
 512         pccb->cmd[3]=0;
 513         pccb->cmd[4]=0;
 514         pccb->cmd[5]=0;
 515         pccb->cmdlen=6;
 516         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 517 }
 518
 519 void scsi_setup_read_capacity(ccb * pccb)
 520 {
 521         pccb->cmd[0]=SCSI_RD_CAPAC;
 522         pccb->cmd[1]=pccb->lun<<5;
 523         pccb->cmd[2]=0;
 524         pccb->cmd[3]=0;
 525         pccb->cmd[4]=0;
 526         pccb->cmd[5]=0;
 527         pccb->cmd[6]=0;
 528         pccb->cmd[7]=0;
 529         pccb->cmd[8]=0;
 530         pccb->cmd[9]=0;
 531         pccb->cmdlen=10;
 532         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 533
 534 }
 535
 536 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks)
 537 {
 538         pccb->cmd[0]=SCSI_READ10;
 539         pccb->cmd[1]=pccb->lun<<5;
 540         pccb->cmd[2]=((unsigned char) (start>>24))&0xff;
 541         pccb->cmd[3]=((unsigned char) (start>>16))&0xff;
 542         pccb->cmd[4]=((unsigned char) (start>>8))&0xff;
 543         pccb->cmd[5]=((unsigned char) (start))&0xff;
 544         pccb->cmd[6]=0;
 545         pccb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
 546         pccb->cmd[8]=(unsigned char) blocks & 0xff;
 547         pccb->cmd[6]=0;
 548         pccb->cmdlen=10;
 549         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 550         debug ("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 551                 pccb->cmd[0],pccb->cmd[1],
 552                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4],pccb->cmd[5],
 553                 pccb->cmd[7],pccb->cmd[8]);
 554 }
 555
 556 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks)
 557 {
 558         pccb->cmd[0]=SCSI_READ6;
 559         pccb->cmd[1]=pccb->lun<<5 | (((unsigned char)(start>>16))&0x1f);
 560         pccb->cmd[2]=((unsigned char) (start>>8))&0xff;
 561         pccb->cmd[3]=((unsigned char) (start))&0xff;
 562         pccb->cmd[4]=(unsigned char) blocks & 0xff;
 563         pccb->cmd[5]=0;
 564         pccb->cmdlen=6;
 565         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 566         debug ("scsi_setup_read6: cmd: %02X %02X startblk %02X%02X blccnt %02X\n",
 567                 pccb->cmd[0],pccb->cmd[1],
 568                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4]);
 569 }
 570
 571
 572 void scsi_setup_inquiry(ccb * pccb)
 573 {
 574         pccb->cmd[0]=SCSI_INQUIRY;
 575         pccb->cmd[1]=pccb->lun<<5;
 576         pccb->cmd[2]=0;
 577         pccb->cmd[3]=0;
 578         if(pccb->datalen>255)
 579                 pccb->cmd[4]=255;
 580         else
 581                 pccb->cmd[4]=(unsigned char)pccb->datalen;
 582         pccb->cmd[5]=0;
 583         pccb->cmdlen=6;
 584         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 585 }
 586
 587 #endif /* #if (CONFIG_COMMANDS & CFG_CMD_SCSI) */