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 #ifdef CONFIG_PARTITIONS
 198 block_dev_desc_t * scsi_get_dev(int dev)
 199 {
 200         return (dev < CONFIG_SYS_SCSI_MAX_DEVICE) ? &scsi_dev_desc[dev] : NULL;
 201 }
 202 #endif
 203
 204 /******************************************************************************
 205  * scsi boot command intepreter. Derived from diskboot
 206  */
 207 int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 208 {
 209         char *boot_device = NULL;
 210         char *ep;
 211         int dev, part = 0;
 212         ulong addr, cnt;
 213         disk_partition_t info;
 214         image_header_t *hdr;
 215 #if defined(CONFIG_FIT)
 216         const void *fit_hdr = NULL;
 217 #endif
 218
 219         switch (argc) {
 220         case 1:
 221                 addr = CONFIG_SYS_LOAD_ADDR;
 222                 boot_device = getenv ("bootdevice");
 223                 break;
 224         case 2:
 225                 addr = simple_strtoul(argv[1], NULL, 16);
 226                 boot_device = getenv ("bootdevice");
 227                 break;
 228         case 3:
 229                 addr = simple_strtoul(argv[1], NULL, 16);
 230                 boot_device = argv[2];
 231                 break;
 232         default:
 233                 return CMD_RET_USAGE;
 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         return bootm_maybe_autostart(cmdtp, argv[0]);
 331 }
 332
 333 /*********************************************************************************
 334  * scsi command intepreter
 335  */
 336 int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 337 {
 338         switch (argc) {
 339         case 0:
 340         case 1:
 341                 return CMD_RET_USAGE;
 342
 343         case 2:
 344                         if (strncmp(argv[1],"res",3) == 0) {
 345                                 printf("\nReset SCSI\n");
 346                                 scsi_bus_reset();
 347                                 scsi_scan(1);
 348                                 return 0;
 349                         }
 350                         if (strncmp(argv[1],"inf",3) == 0) {
 351                                 int i;
 352                                 for (i=0; i<CONFIG_SYS_SCSI_MAX_DEVICE; ++i) {
 353                                         if(scsi_dev_desc[i].type==DEV_TYPE_UNKNOWN)
 354                                                 continue; /* list only known devices */
 355                                         printf ("SCSI dev. %d:  ", i);
 356                                         dev_print(&scsi_dev_desc[i]);
 357                                 }
 358                                 return 0;
 359                         }
 360                         if (strncmp(argv[1],"dev",3) == 0) {
 361                                 if ((scsi_curr_dev < 0) || (scsi_curr_dev >= CONFIG_SYS_SCSI_MAX_DEVICE)) {
 362                                         printf("\nno SCSI devices available\n");
 363                                         return 1;
 364                                 }
 365                                 printf ("\n    Device %d: ", scsi_curr_dev);
 366                                 dev_print(&scsi_dev_desc[scsi_curr_dev]);
 367                                 return 0;
 368                         }
 369                         if (strncmp(argv[1],"scan",4) == 0) {
 370                                 scsi_scan(1);
 371                                 return 0;
 372                         }
 373                         if (strncmp(argv[1],"part",4) == 0) {
 374                                 int dev, ok;
 375                                 for (ok=0, dev=0; dev<CONFIG_SYS_SCSI_MAX_DEVICE; ++dev) {
 376                                         if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
 377                                                 ok++;
 378                                                 if (dev)
 379                                                         printf("\n");
 380                                                 debug ("print_part of %x\n",dev);
 381                                                         print_part(&scsi_dev_desc[dev]);
 382                                         }
 383                                 }
 384                                 if (!ok)
 385                                         printf("\nno SCSI devices available\n");
 386                                 return 1;
 387                         }
 388                         return CMD_RET_USAGE;
 389         case 3:
 390                         if (strncmp(argv[1],"dev",3) == 0) {
 391                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 392                                 printf ("\nSCSI device %d: ", dev);
 393                                 if (dev >= CONFIG_SYS_SCSI_MAX_DEVICE) {
 394                                         printf("unknown device\n");
 395                                         return 1;
 396                                 }
 397                                 printf ("\n    Device %d: ", dev);
 398                                 dev_print(&scsi_dev_desc[dev]);
 399                                 if(scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
 400                                         return 1;
 401                                 }
 402                                 scsi_curr_dev = dev;
 403                                 printf("... is now current device\n");
 404                                 return 0;
 405                         }
 406                         if (strncmp(argv[1],"part",4) == 0) {
 407                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 408                                 if(scsi_dev_desc[dev].type != DEV_TYPE_UNKNOWN) {
 409                                         print_part(&scsi_dev_desc[dev]);
 410                                 }
 411                                 else {
 412                                         printf ("\nSCSI device %d not available\n", dev);
 413                                 }
 414                                 return 1;
 415                         }
 416                         return CMD_RET_USAGE;
 417     default:
 418                         /* at least 4 args */
 419                         if (strcmp(argv[1],"read") == 0) {
 420                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
 421                                 ulong blk  = simple_strtoul(argv[3], NULL, 16);
 422                                 ulong cnt  = simple_strtoul(argv[4], NULL, 16);
 423                                 ulong n;
 424                                 printf ("\nSCSI read: device %d block # %ld, count %ld ... ",
 425                                                 scsi_curr_dev, blk, cnt);
 426                                 n = scsi_read(scsi_curr_dev, blk, cnt, (ulong *)addr);
 427                                 printf ("%ld blocks read: %s\n",n,(n==cnt) ? "OK" : "ERROR");
 428                                 return 0;
 429                         }
 430         } /* switch */
 431         return CMD_RET_USAGE;
 432 }
 433
 434 /****************************************************************************************
 435  * scsi_read
 436  */
 437
 438 #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
 439
 440 ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer)
 441 {
 442         ulong start,blks, buf_addr;
 443         unsigned short smallblks;
 444         ccb* pccb=(ccb *)&tempccb;
 445         device&=0xff;
 446         /* Setup  device
 447          */
 448         pccb->target=scsi_dev_desc[device].target;
 449         pccb->lun=scsi_dev_desc[device].lun;
 450         buf_addr=(unsigned long)buffer;
 451         start=blknr;
 452         blks=blkcnt;
 453         debug ("\nscsi_read: dev %d startblk %lx, blccnt %lx buffer %lx\n",device,start,blks,(unsigned long)buffer);
 454         do {
 455                 pccb->pdata=(unsigned char *)buf_addr;
 456                 if(blks>SCSI_MAX_READ_BLK) {
 457                         pccb->datalen=scsi_dev_desc[device].blksz * SCSI_MAX_READ_BLK;
 458                         smallblks=SCSI_MAX_READ_BLK;
 459                         scsi_setup_read_ext(pccb,start,smallblks);
 460                         start+=SCSI_MAX_READ_BLK;
 461                         blks-=SCSI_MAX_READ_BLK;
 462                 }
 463                 else {
 464                         pccb->datalen=scsi_dev_desc[device].blksz * blks;
 465                         smallblks=(unsigned short) blks;
 466                         scsi_setup_read_ext(pccb,start,smallblks);
 467                         start+=blks;
 468                         blks=0;
 469                 }
 470                 debug ("scsi_read_ext: startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
 471                 if(scsi_exec(pccb)!=TRUE) {
 472                         scsi_print_error(pccb);
 473                         blkcnt-=blks;
 474                         break;
 475                 }
 476                 buf_addr+=pccb->datalen;
 477         } while(blks!=0);
 478         debug ("scsi_read_ext: end startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
 479         return(blkcnt);
 480 }
 481
 482 /* copy src to dest, skipping leading and trailing blanks
 483  * and null terminate the string
 484  */
 485 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len)
 486 {
 487         int start,end;
 488
 489         start=0;
 490         while(start<len) {
 491                 if(src[start]!=' ')
 492                         break;
 493                 start++;
 494         }
 495         end=len-1;
 496         while(end>start) {
 497                 if(src[end]!=' ')
 498                         break;
 499                 end--;
 500         }
 501         for( ; start<=end; start++) {
 502                 *dest++=src[start];
 503         }
 504         *dest='\0';
 505 }
 506
 507
 508 /* Trim trailing blanks, and NUL-terminate string
 509  */
 510 void scsi_trim_trail (unsigned char *str, unsigned int len)
 511 {
 512         unsigned char *p = str + len - 1;
 513
 514         while (len-- > 0) {
 515                 *p-- = '\0';
 516                 if (*p != ' ') {
 517                         return;
 518                 }
 519         }
 520 }
 521
 522
 523 /************************************************************************************
 524  * Some setup (fill-in) routines
 525  */
 526 void scsi_setup_test_unit_ready(ccb * pccb)
 527 {
 528         pccb->cmd[0]=SCSI_TST_U_RDY;
 529         pccb->cmd[1]=pccb->lun<<5;
 530         pccb->cmd[2]=0;
 531         pccb->cmd[3]=0;
 532         pccb->cmd[4]=0;
 533         pccb->cmd[5]=0;
 534         pccb->cmdlen=6;
 535         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 536 }
 537
 538 void scsi_setup_read_capacity(ccb * pccb)
 539 {
 540         pccb->cmd[0]=SCSI_RD_CAPAC;
 541         pccb->cmd[1]=pccb->lun<<5;
 542         pccb->cmd[2]=0;
 543         pccb->cmd[3]=0;
 544         pccb->cmd[4]=0;
 545         pccb->cmd[5]=0;
 546         pccb->cmd[6]=0;
 547         pccb->cmd[7]=0;
 548         pccb->cmd[8]=0;
 549         pccb->cmd[9]=0;
 550         pccb->cmdlen=10;
 551         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 552
 553 }
 554
 555 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks)
 556 {
 557         pccb->cmd[0]=SCSI_READ10;
 558         pccb->cmd[1]=pccb->lun<<5;
 559         pccb->cmd[2]=((unsigned char) (start>>24))&0xff;
 560         pccb->cmd[3]=((unsigned char) (start>>16))&0xff;
 561         pccb->cmd[4]=((unsigned char) (start>>8))&0xff;
 562         pccb->cmd[5]=((unsigned char) (start))&0xff;
 563         pccb->cmd[6]=0;
 564         pccb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
 565         pccb->cmd[8]=(unsigned char) blocks & 0xff;
 566         pccb->cmd[6]=0;
 567         pccb->cmdlen=10;
 568         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 569         debug ("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 570                 pccb->cmd[0],pccb->cmd[1],
 571                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4],pccb->cmd[5],
 572                 pccb->cmd[7],pccb->cmd[8]);
 573 }
 574
 575 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks)
 576 {
 577         pccb->cmd[0]=SCSI_READ6;
 578         pccb->cmd[1]=pccb->lun<<5 | (((unsigned char)(start>>16))&0x1f);
 579         pccb->cmd[2]=((unsigned char) (start>>8))&0xff;
 580         pccb->cmd[3]=((unsigned char) (start))&0xff;
 581         pccb->cmd[4]=(unsigned char) blocks & 0xff;
 582         pccb->cmd[5]=0;
 583         pccb->cmdlen=6;
 584         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 585         debug ("scsi_setup_read6: cmd: %02X %02X startblk %02X%02X blccnt %02X\n",
 586                 pccb->cmd[0],pccb->cmd[1],
 587                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4]);
 588 }
 589
 590
 591 void scsi_setup_inquiry(ccb * pccb)
 592 {
 593         pccb->cmd[0]=SCSI_INQUIRY;
 594         pccb->cmd[1]=pccb->lun<<5;
 595         pccb->cmd[2]=0;
 596         pccb->cmd[3]=0;
 597         if(pccb->datalen>255)
 598                 pccb->cmd[4]=255;
 599         else
 600                 pccb->cmd[4]=(unsigned char)pccb->datalen;
 601         pccb->cmd[5]=0;
 602         pccb->cmdlen=6;
 603         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 604 }
 605
 606
 607 U_BOOT_CMD(
 608         scsi, 5, 1, do_scsi,
 609         "SCSI sub-system",
 610         "reset - reset SCSI controller\n"
 611         "scsi info  - show available SCSI devices\n"
 612         "scsi scan  - (re-)scan SCSI bus\n"
 613         "scsi device [dev] - show or set current device\n"
 614         "scsi part [dev] - print partition table of one or all SCSI devices\n"
 615         "scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 616         "     to memory address `addr'"
 617 );
 618
 619 U_BOOT_CMD(
 620         scsiboot, 3, 1, do_scsiboot,
 621         "boot from SCSI device",
 622         "loadAddr dev:part"
 623 );