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 #ifdef CONFIG_SCSI_SYM53C8XX
  38 #define SCSI_VEND_ID    0x1000
  39 #ifndef CONFIG_SCSI_DEV_ID
  40 #define SCSI_DEV_ID             0x0001
  41 #else
  42 #define SCSI_DEV_ID             CONFIG_SCSI_DEV_ID
  43 #endif
  44 #elif defined CONFIG_SATA_ULI5288
  45
  46 #define SCSI_VEND_ID 0x10b9
  47 #define SCSI_DEV_ID  0x5288
  48
  49 #else
  50 #error no scsi device defined
  51 #endif
  52
  53
  54 static ccb tempccb;     /* temporary scsi command buffer */
  55
  56 static unsigned char tempbuff[512]; /* temporary data buffer */
  57
  58 static int scsi_max_devs; /* number of highest available scsi device */
  59
  60 static int scsi_curr_dev; /* current device */
  61
  62 static block_dev_desc_t scsi_dev_desc[CFG_SCSI_MAX_DEVICE];
  63
  64 /********************************************************************************
  65  *  forward declerations of some Setup Routines
  66  */
  67 void scsi_setup_test_unit_ready(ccb * pccb);
  68 void scsi_setup_read_capacity(ccb * pccb);
  69 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks);
  70 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks);
  71 void scsi_setup_inquiry(ccb * pccb);
  72 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len);
  73
  74
  75 ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer);
  76
  77
  78 /*********************************************************************************
  79  * (re)-scan the scsi bus and reports scsi device info
  80  * to the user if mode = 1
  81  */
  82 void scsi_scan(int mode)
  83 {
  84         unsigned char i,perq,modi,lun;
  85         unsigned long capacity,blksz;
  86         ccb* pccb=(ccb *)&tempccb;
  87
  88         if(mode==1) {
  89                 printf("scanning bus for devices...\n");
  90         }
  91         for(i=0;i<CFG_SCSI_MAX_DEVICE;i++) {
  92                 scsi_dev_desc[i].target=0xff;
  93                 scsi_dev_desc[i].lun=0xff;
  94                 scsi_dev_desc[i].lba=0;
  95                 scsi_dev_desc[i].blksz=0;
  96                 scsi_dev_desc[i].type=DEV_TYPE_UNKNOWN;
  97                 scsi_dev_desc[i].vendor[0]=0;
  98                 scsi_dev_desc[i].product[0]=0;
  99                 scsi_dev_desc[i].revision[0]=0;
 100                 scsi_dev_desc[i].removable=FALSE;
 101                 scsi_dev_desc[i].if_type=IF_TYPE_SCSI;
 102                 scsi_dev_desc[i].dev=i;
 103                 scsi_dev_desc[i].part_type=PART_TYPE_UNKNOWN;
 104                 scsi_dev_desc[i].block_read=scsi_read;
 105         }
 106         scsi_max_devs=0;
 107         for(i=0;i<CFG_SCSI_MAX_SCSI_ID;i++) {
 108                 pccb->target=i;
 109                 for(lun=0;lun<CFG_SCSI_MAX_LUN;lun++) {
 110                         pccb->lun=lun;
 111                         pccb->pdata=(unsigned char *)&tempbuff;
 112                         pccb->datalen=512;
 113                         scsi_setup_inquiry(pccb);
 114                         if(scsi_exec(pccb)!=TRUE) {
 115                                 if(pccb->contr_stat==SCSI_SEL_TIME_OUT) {
 116                                         debug ("Selection timeout ID %d\n",pccb->target);
 117                                         continue; /* selection timeout => assuming no device present */
 118                                 }
 119                                 scsi_print_error(pccb);
 120                                 continue;
 121                         }
 122                         perq=tempbuff[0];
 123                         modi=tempbuff[1];
 124                         if((perq & 0x1f)==0x1f) {
 125                                 continue; /* skip unknown devices */
 126                         }
 127                         if((modi&0x80)==0x80) /* drive is removable */
 128                                 scsi_dev_desc[scsi_max_devs].removable=TRUE;
 129                         /* get info for this device */
 130                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].vendor[0],
 131                                        &tempbuff[8], 8);
 132                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].product[0],
 133                                        &tempbuff[16], 16);
 134                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].revision[0],
 135                                        &tempbuff[32], 4);
 136                         scsi_dev_desc[scsi_max_devs].target=pccb->target;
 137                         scsi_dev_desc[scsi_max_devs].lun=pccb->lun;
 138
 139                         pccb->datalen=0;
 140                         scsi_setup_test_unit_ready(pccb);
 141                         if(scsi_exec(pccb)!=TRUE) {
 142                                 if(scsi_dev_desc[scsi_max_devs].removable==TRUE) {
 143                                         scsi_dev_desc[scsi_max_devs].type=perq;
 144                                         goto removable;
 145                                 }
 146                                 scsi_print_error(pccb);
 147                                 continue;
 148                         }
 149                         pccb->datalen=8;
 150                         scsi_setup_read_capacity(pccb);
 151                         if(scsi_exec(pccb)!=TRUE) {
 152                                 scsi_print_error(pccb);
 153                                 continue;
 154                         }
 155                         capacity=((unsigned long)tempbuff[0]<<24)|((unsigned long)tempbuff[1]<<16)|
 156                                         ((unsigned long)tempbuff[2]<<8)|((unsigned long)tempbuff[3]);
 157                         blksz=((unsigned long)tempbuff[4]<<24)|((unsigned long)tempbuff[5]<<16)|
 158                                 ((unsigned long)tempbuff[6]<<8)|((unsigned long)tempbuff[7]);
 159                         scsi_dev_desc[scsi_max_devs].lba=capacity;
 160                         scsi_dev_desc[scsi_max_devs].blksz=blksz;
 161                         scsi_dev_desc[scsi_max_devs].type=perq;
 162                         init_part(&scsi_dev_desc[scsi_max_devs]);
 163 removable:
 164                         if(mode==1) {
 165                                 printf ("  Device %d: ", scsi_max_devs);
 166                                 dev_print(&scsi_dev_desc[scsi_max_devs]);
 167                         } /* if mode */
 168                         scsi_max_devs++;
 169                 } /* next LUN */
 170         }
 171         if(scsi_max_devs>0)
 172                 scsi_curr_dev=0;
 173         else
 174                 scsi_curr_dev=-1;
 175 }
 176
 177
 178 void scsi_init(void)
 179 {
 180         int busdevfunc;
 181
 182         busdevfunc=pci_find_device(SCSI_VEND_ID,SCSI_DEV_ID,0); /* get PCI Device ID */
 183         if(busdevfunc==-1) {
 184                 printf("Error SCSI Controller (%04X,%04X) not found\n",SCSI_VEND_ID,SCSI_DEV_ID);
 185                 return;
 186         }
 187 #ifdef DEBUG
 188         else {
 189                 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);
 190         }
 191 #endif
 192         scsi_low_level_init(busdevfunc);
 193         scsi_scan(1);
 194 }
 195
 196 block_dev_desc_t * scsi_get_dev(int dev)
 197 {
 198         return (dev < CFG_SCSI_MAX_DEVICE) ? &scsi_dev_desc[dev] : NULL;
 199 }
 200
 201
 202 /******************************************************************************
 203  * scsi boot command intepreter. Derived from diskboot
 204  */
 205 int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 206 {
 207         char *boot_device = NULL;
 208         char *ep;
 209         int dev, part = 0;
 210         ulong addr, cnt;
 211         disk_partition_t info;
 212         image_header_t *hdr;
 213         int rcode = 0;
 214 #if defined(CONFIG_FIT)
 215         const void *fit_hdr = NULL;
 216 #endif
 217
 218         switch (argc) {
 219         case 1:
 220                 addr = CFG_LOAD_ADDR;
 221                 boot_device = getenv ("bootdevice");
 222                 break;
 223         case 2:
 224                 addr = simple_strtoul(argv[1], NULL, 16);
 225                 boot_device = getenv ("bootdevice");
 226                 break;
 227         case 3:
 228                 addr = simple_strtoul(argv[1], NULL, 16);
 229                 boot_device = argv[2];
 230                 break;
 231         default:
 232                 printf ("Usage:\n%s\n", cmdtp->usage);
 233                 return 1;
 234         }
 235
 236         if (!boot_device) {
 237                 puts ("\n** No boot device **\n");
 238                 return 1;
 239         }
 240
 241         dev = simple_strtoul(boot_device, &ep, 16);
 242         printf("booting from dev %d\n",dev);
 243         if (scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
 244                 printf ("\n** Device %d not available\n", dev);
 245                 return 1;
 246         }
 247
 248         if (*ep) {
 249                 if (*ep != ':') {
 250                         puts ("\n** Invalid boot device, use `dev[:part]' **\n");
 251                         return 1;
 252                 }
 253                 part = simple_strtoul(++ep, NULL, 16);
 254         }
 255         if (get_partition_info (&scsi_dev_desc[dev], part, &info)) {
 256                 printf("error reading partinfo\n");
 257                 return 1;
 258         }
 259         if ((strncmp((char *)(info.type), BOOT_PART_TYPE, sizeof(info.type)) != 0) &&
 260             (strncmp((char *)(info.type), BOOT_PART_COMP, sizeof(info.type)) != 0)) {
 261                 printf ("\n** Invalid partition type \"%.32s\""
 262                         " (expect \"" BOOT_PART_TYPE "\")\n",
 263                         info.type);
 264                 return 1;
 265         }
 266
 267         printf ("\nLoading from SCSI device %d, partition %d: "
 268                 "Name: %.32s  Type: %.32s\n",
 269                 dev, part, info.name, info.type);
 270
 271         debug ("First Block: %ld,  # of blocks: %ld, Block Size: %ld\n",
 272                 info.start, info.size, info.blksz);
 273
 274         if (scsi_read (dev, info.start, 1, (ulong *)addr) != 1) {
 275                 printf ("** Read error on %d:%d\n", dev, part);
 276                 return 1;
 277         }
 278
 279         switch (genimg_get_format ((void *)addr)) {
 280         case IMAGE_FORMAT_LEGACY:
 281                 hdr = (image_header_t *)addr;
 282
 283                 if (!image_check_hcrc (hdr)) {
 284                         puts ("\n** Bad Header Checksum **\n");
 285                         return 1;
 286                 }
 287
 288                 image_print_contents (hdr);
 289                 cnt = image_get_image_size (hdr);
 290                 break;
 291 #if defined(CONFIG_FIT)
 292         case IMAGE_FORMAT_FIT:
 293                 fit_hdr = (const void *)addr;
 294                 puts ("Fit image detected...\n");
 295
 296                 cnt = fit_get_size (fit_hdr);
 297                 break;
 298 #endif
 299         default:
 300                 puts ("** Unknown image type\n");
 301                 return 1;
 302         }
 303
 304         cnt += info.blksz - 1;
 305         cnt /= info.blksz;
 306         cnt -= 1;
 307
 308         if (scsi_read (dev, info.start+1, cnt,
 309                       (ulong *)(addr+info.blksz)) != cnt) {
 310                 printf ("** Read error on %d:%d\n", dev, part);
 311                 return 1;
 312         }
 313
 314 #if defined(CONFIG_FIT)
 315         /* This cannot be done earlier, we need complete FIT image in RAM first */
 316         if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
 317                 if (!fit_check_format (fit_hdr)) {
 318                         puts ("** Bad FIT image format\n");
 319                         return 1;
 320                 }
 321                 fit_print_contents (fit_hdr);
 322         }
 323 #endif
 324
 325         /* Loading ok, update default load address */
 326         load_addr = addr;
 327
 328         flush_cache (addr, (cnt+1)*info.blksz);
 329
 330         /* Check if we should attempt an auto-start */
 331         if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
 332                 char *local_args[2];
 333                 extern int do_bootm (cmd_tbl_t *, int, int, char *[]);
 334                 local_args[0] = argv[0];
 335                 local_args[1] = NULL;
 336                 printf ("Automatic boot of image at addr 0x%08lX ...\n", addr);
 337                 rcode = do_bootm (cmdtp, 0, 1, local_args);
 338         }
 339          return rcode;
 340 }
 341
 342 /*********************************************************************************
 343  * scsi command intepreter
 344  */
 345 int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 346 {
 347         switch (argc) {
 348     case 0:
 349     case 1:     printf ("Usage:\n%s\n", cmdtp->usage);  return 1;
 350     case 2:
 351                         if (strncmp(argv[1],"res",3) == 0) {
 352                                 printf("\nReset SCSI\n");
 353                                 scsi_bus_reset();
 354                                 scsi_scan(1);
 355                                 return 0;
 356                         }
 357                         if (strncmp(argv[1],"inf",3) == 0) {
 358                                 int i;
 359                                 for (i=0; i<CFG_SCSI_MAX_DEVICE; ++i) {
 360                                         if(scsi_dev_desc[i].type==DEV_TYPE_UNKNOWN)
 361                                                 continue; /* list only known devices */
 362                                         printf ("SCSI dev. %d:  ", i);
 363                                         dev_print(&scsi_dev_desc[i]);
 364                                 }
 365                                 return 0;
 366                         }
 367                         if (strncmp(argv[1],"dev",3) == 0) {
 368                                 if ((scsi_curr_dev < 0) || (scsi_curr_dev >= CFG_SCSI_MAX_DEVICE)) {
 369                                         printf("\nno SCSI devices available\n");
 370                                         return 1;
 371                                 }
 372                                 printf ("\n    Device %d: ", scsi_curr_dev);
 373                                 dev_print(&scsi_dev_desc[scsi_curr_dev]);
 374                                 return 0;
 375                         }
 376                         if (strncmp(argv[1],"scan",4) == 0) {
 377                                 scsi_scan(1);
 378                                 return 0;
 379                         }
 380                         if (strncmp(argv[1],"part",4) == 0) {
 381                                 int dev, ok;
 382                                 for (ok=0, dev=0; dev<CFG_SCSI_MAX_DEVICE; ++dev) {
 383                                         if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
 384                                                 ok++;
 385                                                 if (dev)
 386                                                         printf("\n");
 387                                                 debug ("print_part of %x\n",dev);
 388                                                         print_part(&scsi_dev_desc[dev]);
 389                                         }
 390                                 }
 391                                 if (!ok)
 392                                         printf("\nno SCSI devices available\n");
 393                                 return 1;
 394                         }
 395                         printf ("Usage:\n%s\n", cmdtp->usage);
 396                         return 1;
 397         case 3:
 398                         if (strncmp(argv[1],"dev",3) == 0) {
 399                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 400                                 printf ("\nSCSI device %d: ", dev);
 401                                 if (dev >= CFG_SCSI_MAX_DEVICE) {
 402                                         printf("unknown device\n");
 403                                         return 1;
 404                                 }
 405                                 printf ("\n    Device %d: ", dev);
 406                                 dev_print(&scsi_dev_desc[dev]);
 407                                 if(scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
 408                                         return 1;
 409                                 }
 410                                 scsi_curr_dev = dev;
 411                                 printf("... is now current device\n");
 412                                 return 0;
 413                         }
 414                         if (strncmp(argv[1],"part",4) == 0) {
 415                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 416                                 if(scsi_dev_desc[dev].type != DEV_TYPE_UNKNOWN) {
 417                                         print_part(&scsi_dev_desc[dev]);
 418                                 }
 419                                 else {
 420                                         printf ("\nSCSI device %d not available\n", dev);
 421                                 }
 422                                 return 1;
 423                         }
 424                         printf ("Usage:\n%s\n", cmdtp->usage);
 425                         return 1;
 426     default:
 427                         /* at least 4 args */
 428                         if (strcmp(argv[1],"read") == 0) {
 429                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
 430                                 ulong blk  = simple_strtoul(argv[3], NULL, 16);
 431                                 ulong cnt  = simple_strtoul(argv[4], NULL, 16);
 432                                 ulong n;
 433                                 printf ("\nSCSI read: device %d block # %ld, count %ld ... ",
 434                                                 scsi_curr_dev, blk, cnt);
 435                                 n = scsi_read(scsi_curr_dev, blk, cnt, (ulong *)addr);
 436                                 printf ("%ld blocks read: %s\n",n,(n==cnt) ? "OK" : "ERROR");
 437                                 return 0;
 438                         }
 439         } /* switch */
 440         printf ("Usage:\n%s\n", cmdtp->usage);
 441         return 1;
 442 }
 443
 444 /****************************************************************************************
 445  * scsi_read
 446  */
 447
 448 #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
 449
 450 ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer)
 451 {
 452         ulong start,blks, buf_addr;
 453         unsigned short smallblks;
 454         ccb* pccb=(ccb *)&tempccb;
 455         device&=0xff;
 456         /* Setup  device
 457          */
 458         pccb->target=scsi_dev_desc[device].target;
 459         pccb->lun=scsi_dev_desc[device].lun;
 460         buf_addr=(unsigned long)buffer;
 461         start=blknr;
 462         blks=blkcnt;
 463         debug ("\nscsi_read: dev %d startblk %lx, blccnt %lx buffer %lx\n",device,start,blks,(unsigned long)buffer);
 464         do {
 465                 pccb->pdata=(unsigned char *)buf_addr;
 466                 if(blks>SCSI_MAX_READ_BLK) {
 467                         pccb->datalen=scsi_dev_desc[device].blksz * SCSI_MAX_READ_BLK;
 468                         smallblks=SCSI_MAX_READ_BLK;
 469                         scsi_setup_read_ext(pccb,start,smallblks);
 470                         start+=SCSI_MAX_READ_BLK;
 471                         blks-=SCSI_MAX_READ_BLK;
 472                 }
 473                 else {
 474                         pccb->datalen=scsi_dev_desc[device].blksz * blks;
 475                         smallblks=(unsigned short) blks;
 476                         scsi_setup_read_ext(pccb,start,smallblks);
 477                         start+=blks;
 478                         blks=0;
 479                 }
 480                 debug ("scsi_read_ext: startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
 481                 if(scsi_exec(pccb)!=TRUE) {
 482                         scsi_print_error(pccb);
 483                         blkcnt-=blks;
 484                         break;
 485                 }
 486                 buf_addr+=pccb->datalen;
 487         } while(blks!=0);
 488         debug ("scsi_read_ext: end startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
 489         return(blkcnt);
 490 }
 491
 492 /* copy src to dest, skipping leading and trailing blanks
 493  * and null terminate the string
 494  */
 495 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len)
 496 {
 497         int start,end;
 498
 499         start=0;
 500         while(start<len) {
 501                 if(src[start]!=' ')
 502                         break;
 503                 start++;
 504         }
 505         end=len-1;
 506         while(end>start) {
 507                 if(src[end]!=' ')
 508                         break;
 509                 end--;
 510         }
 511         for( ; start<=end; start++) {
 512                 *dest++=src[start];
 513         }
 514         *dest='\0';
 515 }
 516
 517
 518 /* Trim trailing blanks, and NUL-terminate string
 519  */
 520 void scsi_trim_trail (unsigned char *str, unsigned int len)
 521 {
 522         unsigned char *p = str + len - 1;
 523
 524         while (len-- > 0) {
 525                 *p-- = '\0';
 526                 if (*p != ' ') {
 527                         return;
 528                 }
 529         }
 530 }
 531
 532
 533 /************************************************************************************
 534  * Some setup (fill-in) routines
 535  */
 536 void scsi_setup_test_unit_ready(ccb * pccb)
 537 {
 538         pccb->cmd[0]=SCSI_TST_U_RDY;
 539         pccb->cmd[1]=pccb->lun<<5;
 540         pccb->cmd[2]=0;
 541         pccb->cmd[3]=0;
 542         pccb->cmd[4]=0;
 543         pccb->cmd[5]=0;
 544         pccb->cmdlen=6;
 545         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 546 }
 547
 548 void scsi_setup_read_capacity(ccb * pccb)
 549 {
 550         pccb->cmd[0]=SCSI_RD_CAPAC;
 551         pccb->cmd[1]=pccb->lun<<5;
 552         pccb->cmd[2]=0;
 553         pccb->cmd[3]=0;
 554         pccb->cmd[4]=0;
 555         pccb->cmd[5]=0;
 556         pccb->cmd[6]=0;
 557         pccb->cmd[7]=0;
 558         pccb->cmd[8]=0;
 559         pccb->cmd[9]=0;
 560         pccb->cmdlen=10;
 561         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 562
 563 }
 564
 565 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks)
 566 {
 567         pccb->cmd[0]=SCSI_READ10;
 568         pccb->cmd[1]=pccb->lun<<5;
 569         pccb->cmd[2]=((unsigned char) (start>>24))&0xff;
 570         pccb->cmd[3]=((unsigned char) (start>>16))&0xff;
 571         pccb->cmd[4]=((unsigned char) (start>>8))&0xff;
 572         pccb->cmd[5]=((unsigned char) (start))&0xff;
 573         pccb->cmd[6]=0;
 574         pccb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
 575         pccb->cmd[8]=(unsigned char) blocks & 0xff;
 576         pccb->cmd[6]=0;
 577         pccb->cmdlen=10;
 578         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 579         debug ("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 580                 pccb->cmd[0],pccb->cmd[1],
 581                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4],pccb->cmd[5],
 582                 pccb->cmd[7],pccb->cmd[8]);
 583 }
 584
 585 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks)
 586 {
 587         pccb->cmd[0]=SCSI_READ6;
 588         pccb->cmd[1]=pccb->lun<<5 | (((unsigned char)(start>>16))&0x1f);
 589         pccb->cmd[2]=((unsigned char) (start>>8))&0xff;
 590         pccb->cmd[3]=((unsigned char) (start))&0xff;
 591         pccb->cmd[4]=(unsigned char) blocks & 0xff;
 592         pccb->cmd[5]=0;
 593         pccb->cmdlen=6;
 594         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 595         debug ("scsi_setup_read6: cmd: %02X %02X startblk %02X%02X blccnt %02X\n",
 596                 pccb->cmd[0],pccb->cmd[1],
 597                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4]);
 598 }
 599
 600
 601 void scsi_setup_inquiry(ccb * pccb)
 602 {
 603         pccb->cmd[0]=SCSI_INQUIRY;
 604         pccb->cmd[1]=pccb->lun<<5;
 605         pccb->cmd[2]=0;
 606         pccb->cmd[3]=0;
 607         if(pccb->datalen>255)
 608                 pccb->cmd[4]=255;
 609         else
 610                 pccb->cmd[4]=(unsigned char)pccb->datalen;
 611         pccb->cmd[5]=0;
 612         pccb->cmdlen=6;
 613         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 614 }
 615
 616
 617 U_BOOT_CMD(
 618         scsi, 5, 1, do_scsi,
 619         "scsi    - SCSI sub-system\n",
 620         "reset - reset SCSI controller\n"
 621         "scsi info  - show available SCSI devices\n"
 622         "scsi scan  - (re-)scan SCSI bus\n"
 623         "scsi device [dev] - show or set current device\n"
 624         "scsi part [dev] - print partition table of one or all SCSI devices\n"
 625         "scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 626         "     to memory address `addr'\n"
 627 );
 628
 629 U_BOOT_CMD(
 630         scsiboot, 3, 1, do_scsiboot,
 631         "scsiboot- boot from SCSI device\n",
 632         "loadAddr dev:part\n"
 633 );