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 #elif !defined(CONFIG_SCSI_AHCI_PLAT)
  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[CONFIG_SYS_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<CONFIG_SYS_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<CONFIG_SYS_SCSI_MAX_SCSI_ID;i++) {
 108                 pccb->target=i;
 109                 for(lun=0;lun<CONFIG_SYS_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 #ifdef CONFIG_PCI
 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 #endif
 196
 197 block_dev_desc_t * scsi_get_dev(int dev)
 198 {
 199         return (dev < CONFIG_SYS_SCSI_MAX_DEVICE) ? &scsi_dev_desc[dev] : NULL;
 200 }
 201
 202
 203 /******************************************************************************
 204  * scsi boot command intepreter. Derived from diskboot
 205  */
 206 int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 207 {
 208         char *boot_device = NULL;
 209         char *ep;
 210         int dev, part = 0;
 211         ulong addr, cnt;
 212         disk_partition_t info;
 213         image_header_t *hdr;
 214 #if defined(CONFIG_FIT)
 215         const void *fit_hdr = NULL;
 216 #endif
 217
 218         switch (argc) {
 219         case 1:
 220                 addr = CONFIG_SYS_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                 return cmd_usage(cmdtp);
 233         }
 234
 235         if (!boot_device) {
 236                 puts ("\n** No boot device **\n");
 237                 return 1;
 238         }
 239
 240         dev = simple_strtoul(boot_device, &ep, 16);
 241         printf("booting from dev %d\n",dev);
 242         if (scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
 243                 printf ("\n** Device %d not available\n", dev);
 244                 return 1;
 245         }
 246
 247         if (*ep) {
 248                 if (*ep != ':') {
 249                         puts ("\n** Invalid boot device, use `dev[:part]' **\n");
 250                         return 1;
 251                 }
 252                 part = simple_strtoul(++ep, NULL, 16);
 253         }
 254         if (get_partition_info (&scsi_dev_desc[dev], part, &info)) {
 255                 printf("error reading partinfo\n");
 256                 return 1;
 257         }
 258         if ((strncmp((char *)(info.type), BOOT_PART_TYPE, sizeof(info.type)) != 0) &&
 259             (strncmp((char *)(info.type), BOOT_PART_COMP, sizeof(info.type)) != 0)) {
 260                 printf ("\n** Invalid partition type \"%.32s\""
 261                         " (expect \"" BOOT_PART_TYPE "\")\n",
 262                         info.type);
 263                 return 1;
 264         }
 265
 266         printf ("\nLoading from SCSI device %d, partition %d: "
 267                 "Name: %.32s  Type: %.32s\n",
 268                 dev, part, info.name, info.type);
 269
 270         debug ("First Block: %ld,  # of blocks: %ld, Block Size: %ld\n",
 271                 info.start, info.size, info.blksz);
 272
 273         if (scsi_read (dev, info.start, 1, (ulong *)addr) != 1) {
 274                 printf ("** Read error on %d:%d\n", dev, part);
 275                 return 1;
 276         }
 277
 278         switch (genimg_get_format ((void *)addr)) {
 279         case IMAGE_FORMAT_LEGACY:
 280                 hdr = (image_header_t *)addr;
 281
 282                 if (!image_check_hcrc (hdr)) {
 283                         puts ("\n** Bad Header Checksum **\n");
 284                         return 1;
 285                 }
 286
 287                 image_print_contents (hdr);
 288                 cnt = image_get_image_size (hdr);
 289                 break;
 290 #if defined(CONFIG_FIT)
 291         case IMAGE_FORMAT_FIT:
 292                 fit_hdr = (const void *)addr;
 293                 puts ("Fit image detected...\n");
 294
 295                 cnt = fit_get_size (fit_hdr);
 296                 break;
 297 #endif
 298         default:
 299                 puts ("** Unknown image type\n");
 300                 return 1;
 301         }
 302
 303         cnt += info.blksz - 1;
 304         cnt /= info.blksz;
 305         cnt -= 1;
 306
 307         if (scsi_read (dev, info.start+1, cnt,
 308                       (ulong *)(addr+info.blksz)) != cnt) {
 309                 printf ("** Read error on %d:%d\n", dev, part);
 310                 return 1;
 311         }
 312
 313 #if defined(CONFIG_FIT)
 314         /* This cannot be done earlier, we need complete FIT image in RAM first */
 315         if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
 316                 if (!fit_check_format (fit_hdr)) {
 317                         puts ("** Bad FIT image format\n");
 318                         return 1;
 319                 }
 320                 fit_print_contents (fit_hdr);
 321         }
 322 #endif
 323
 324         /* Loading ok, update default load address */
 325         load_addr = addr;
 326
 327         flush_cache (addr, (cnt+1)*info.blksz);
 328
 329         return bootm_maybe_autostart(cmdtp, argv[0]);
 330 }
 331
 332 /*********************************************************************************
 333  * scsi command intepreter
 334  */
 335 int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 336 {
 337         switch (argc) {
 338     case 0:
 339     case 1:     return cmd_usage(cmdtp);
 340
 341     case 2:
 342                         if (strncmp(argv[1],"res",3) == 0) {
 343                                 printf("\nReset SCSI\n");
 344                                 scsi_bus_reset();
 345                                 scsi_scan(1);
 346                                 return 0;
 347                         }
 348                         if (strncmp(argv[1],"inf",3) == 0) {
 349                                 int i;
 350                                 for (i=0; i<CONFIG_SYS_SCSI_MAX_DEVICE; ++i) {
 351                                         if(scsi_dev_desc[i].type==DEV_TYPE_UNKNOWN)
 352                                                 continue; /* list only known devices */
 353                                         printf ("SCSI dev. %d:  ", i);
 354                                         dev_print(&scsi_dev_desc[i]);
 355                                 }
 356                                 return 0;
 357                         }
 358                         if (strncmp(argv[1],"dev",3) == 0) {
 359                                 if ((scsi_curr_dev < 0) || (scsi_curr_dev >= CONFIG_SYS_SCSI_MAX_DEVICE)) {
 360                                         printf("\nno SCSI devices available\n");
 361                                         return 1;
 362                                 }
 363                                 printf ("\n    Device %d: ", scsi_curr_dev);
 364                                 dev_print(&scsi_dev_desc[scsi_curr_dev]);
 365                                 return 0;
 366                         }
 367                         if (strncmp(argv[1],"scan",4) == 0) {
 368                                 scsi_scan(1);
 369                                 return 0;
 370                         }
 371                         if (strncmp(argv[1],"part",4) == 0) {
 372                                 int dev, ok;
 373                                 for (ok=0, dev=0; dev<CONFIG_SYS_SCSI_MAX_DEVICE; ++dev) {
 374                                         if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
 375                                                 ok++;
 376                                                 if (dev)
 377                                                         printf("\n");
 378                                                 debug ("print_part of %x\n",dev);
 379                                                         print_part(&scsi_dev_desc[dev]);
 380                                         }
 381                                 }
 382                                 if (!ok)
 383                                         printf("\nno SCSI devices available\n");
 384                                 return 1;
 385                         }
 386                         return cmd_usage(cmdtp);
 387         case 3:
 388                         if (strncmp(argv[1],"dev",3) == 0) {
 389                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 390                                 printf ("\nSCSI device %d: ", dev);
 391                                 if (dev >= CONFIG_SYS_SCSI_MAX_DEVICE) {
 392                                         printf("unknown device\n");
 393                                         return 1;
 394                                 }
 395                                 printf ("\n    Device %d: ", dev);
 396                                 dev_print(&scsi_dev_desc[dev]);
 397                                 if(scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
 398                                         return 1;
 399                                 }
 400                                 scsi_curr_dev = dev;
 401                                 printf("... is now current device\n");
 402                                 return 0;
 403                         }
 404                         if (strncmp(argv[1],"part",4) == 0) {
 405                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 406                                 if(scsi_dev_desc[dev].type != DEV_TYPE_UNKNOWN) {
 407                                         print_part(&scsi_dev_desc[dev]);
 408                                 }
 409                                 else {
 410                                         printf ("\nSCSI device %d not available\n", dev);
 411                                 }
 412                                 return 1;
 413                         }
 414                         return cmd_usage(cmdtp);
 415     default:
 416                         /* at least 4 args */
 417                         if (strcmp(argv[1],"read") == 0) {
 418                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
 419                                 ulong blk  = simple_strtoul(argv[3], NULL, 16);
 420                                 ulong cnt  = simple_strtoul(argv[4], NULL, 16);
 421                                 ulong n;
 422                                 printf ("\nSCSI read: device %d block # %ld, count %ld ... ",
 423                                                 scsi_curr_dev, blk, cnt);
 424                                 n = scsi_read(scsi_curr_dev, blk, cnt, (ulong *)addr);
 425                                 printf ("%ld blocks read: %s\n",n,(n==cnt) ? "OK" : "ERROR");
 426                                 return 0;
 427                         }
 428         } /* switch */
 429         return cmd_usage(cmdtp);
 430 }
 431
 432 /****************************************************************************************
 433  * scsi_read
 434  */
 435
 436 #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
 437
 438 ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer)
 439 {
 440         ulong start,blks, buf_addr;
 441         unsigned short smallblks;
 442         ccb* pccb=(ccb *)&tempccb;
 443         device&=0xff;
 444         /* Setup  device
 445          */
 446         pccb->target=scsi_dev_desc[device].target;
 447         pccb->lun=scsi_dev_desc[device].lun;
 448         buf_addr=(unsigned long)buffer;
 449         start=blknr;
 450         blks=blkcnt;
 451         debug ("\nscsi_read: dev %d startblk %lx, blccnt %lx buffer %lx\n",device,start,blks,(unsigned long)buffer);
 452         do {
 453                 pccb->pdata=(unsigned char *)buf_addr;
 454                 if(blks>SCSI_MAX_READ_BLK) {
 455                         pccb->datalen=scsi_dev_desc[device].blksz * SCSI_MAX_READ_BLK;
 456                         smallblks=SCSI_MAX_READ_BLK;
 457                         scsi_setup_read_ext(pccb,start,smallblks);
 458                         start+=SCSI_MAX_READ_BLK;
 459                         blks-=SCSI_MAX_READ_BLK;
 460                 }
 461                 else {
 462                         pccb->datalen=scsi_dev_desc[device].blksz * blks;
 463                         smallblks=(unsigned short) blks;
 464                         scsi_setup_read_ext(pccb,start,smallblks);
 465                         start+=blks;
 466                         blks=0;
 467                 }
 468                 debug ("scsi_read_ext: startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
 469                 if(scsi_exec(pccb)!=TRUE) {
 470                         scsi_print_error(pccb);
 471                         blkcnt-=blks;
 472                         break;
 473                 }
 474                 buf_addr+=pccb->datalen;
 475         } while(blks!=0);
 476         debug ("scsi_read_ext: end startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
 477         return(blkcnt);
 478 }
 479
 480 /* copy src to dest, skipping leading and trailing blanks
 481  * and null terminate the string
 482  */
 483 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len)
 484 {
 485         int start,end;
 486
 487         start=0;
 488         while(start<len) {
 489                 if(src[start]!=' ')
 490                         break;
 491                 start++;
 492         }
 493         end=len-1;
 494         while(end>start) {
 495                 if(src[end]!=' ')
 496                         break;
 497                 end--;
 498         }
 499         for( ; start<=end; start++) {
 500                 *dest++=src[start];
 501         }
 502         *dest='\0';
 503 }
 504
 505
 506 /* Trim trailing blanks, and NUL-terminate string
 507  */
 508 void scsi_trim_trail (unsigned char *str, unsigned int len)
 509 {
 510         unsigned char *p = str + len - 1;
 511
 512         while (len-- > 0) {
 513                 *p-- = '\0';
 514                 if (*p != ' ') {
 515                         return;
 516                 }
 517         }
 518 }
 519
 520
 521 /************************************************************************************
 522  * Some setup (fill-in) routines
 523  */
 524 void scsi_setup_test_unit_ready(ccb * pccb)
 525 {
 526         pccb->cmd[0]=SCSI_TST_U_RDY;
 527         pccb->cmd[1]=pccb->lun<<5;
 528         pccb->cmd[2]=0;
 529         pccb->cmd[3]=0;
 530         pccb->cmd[4]=0;
 531         pccb->cmd[5]=0;
 532         pccb->cmdlen=6;
 533         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 534 }
 535
 536 void scsi_setup_read_capacity(ccb * pccb)
 537 {
 538         pccb->cmd[0]=SCSI_RD_CAPAC;
 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->cmd[6]=0;
 545         pccb->cmd[7]=0;
 546         pccb->cmd[8]=0;
 547         pccb->cmd[9]=0;
 548         pccb->cmdlen=10;
 549         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 550
 551 }
 552
 553 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks)
 554 {
 555         pccb->cmd[0]=SCSI_READ10;
 556         pccb->cmd[1]=pccb->lun<<5;
 557         pccb->cmd[2]=((unsigned char) (start>>24))&0xff;
 558         pccb->cmd[3]=((unsigned char) (start>>16))&0xff;
 559         pccb->cmd[4]=((unsigned char) (start>>8))&0xff;
 560         pccb->cmd[5]=((unsigned char) (start))&0xff;
 561         pccb->cmd[6]=0;
 562         pccb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
 563         pccb->cmd[8]=(unsigned char) blocks & 0xff;
 564         pccb->cmd[6]=0;
 565         pccb->cmdlen=10;
 566         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 567         debug ("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 568                 pccb->cmd[0],pccb->cmd[1],
 569                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4],pccb->cmd[5],
 570                 pccb->cmd[7],pccb->cmd[8]);
 571 }
 572
 573 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks)
 574 {
 575         pccb->cmd[0]=SCSI_READ6;
 576         pccb->cmd[1]=pccb->lun<<5 | (((unsigned char)(start>>16))&0x1f);
 577         pccb->cmd[2]=((unsigned char) (start>>8))&0xff;
 578         pccb->cmd[3]=((unsigned char) (start))&0xff;
 579         pccb->cmd[4]=(unsigned char) blocks & 0xff;
 580         pccb->cmd[5]=0;
 581         pccb->cmdlen=6;
 582         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 583         debug ("scsi_setup_read6: cmd: %02X %02X startblk %02X%02X blccnt %02X\n",
 584                 pccb->cmd[0],pccb->cmd[1],
 585                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4]);
 586 }
 587
 588
 589 void scsi_setup_inquiry(ccb * pccb)
 590 {
 591         pccb->cmd[0]=SCSI_INQUIRY;
 592         pccb->cmd[1]=pccb->lun<<5;
 593         pccb->cmd[2]=0;
 594         pccb->cmd[3]=0;
 595         if(pccb->datalen>255)
 596                 pccb->cmd[4]=255;
 597         else
 598                 pccb->cmd[4]=(unsigned char)pccb->datalen;
 599         pccb->cmd[5]=0;
 600         pccb->cmdlen=6;
 601         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 602 }
 603
 604
 605 U_BOOT_CMD(
 606         scsi, 5, 1, do_scsi,
 607         "SCSI sub-system",
 608         "reset - reset SCSI controller\n"
 609         "scsi info  - show available SCSI devices\n"
 610         "scsi scan  - (re-)scan SCSI bus\n"
 611         "scsi device [dev] - show or set current device\n"
 612         "scsi part [dev] - print partition table of one or all SCSI devices\n"
 613         "scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 614         "     to memory address `addr'"
 615 );
 616
 617 U_BOOT_CMD(
 618         scsiboot, 3, 1, do_scsiboot,
 619         "boot from SCSI device",
 620         "loadAddr dev:part"
 621 );