common/cmd_scsi.c

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*
   9  * SCSI support.
  10  */
  11 #include <common.h>
  12 #include <command.h>
  13 #include <asm/processor.h>
  14 #include <scsi.h>
  15 #include <image.h>
  16 #include <pci.h>
  17
  18 #ifdef CONFIG_SCSI_DEV_LIST
  19 #define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
  20 #else
  21 #ifdef CONFIG_SCSI_SYM53C8XX
  22 #define SCSI_VEND_ID    0x1000
  23 #ifndef CONFIG_SCSI_DEV_ID
  24 #define SCSI_DEV_ID             0x0001
  25 #else
  26 #define SCSI_DEV_ID             CONFIG_SCSI_DEV_ID
  27 #endif
  28 #elif defined CONFIG_SATA_ULI5288
  29
  30 #define SCSI_VEND_ID 0x10b9
  31 #define SCSI_DEV_ID  0x5288
  32
  33 #elif !defined(CONFIG_SCSI_AHCI_PLAT)
  34 #error no scsi device defined
  35 #endif
  36 #define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
  37 #endif
  38
  39 #ifdef CONFIG_PCI
  40 const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
  41 #endif
  42 static ccb tempccb;     /* temporary scsi command buffer */
  43
  44 static unsigned char tempbuff[512]; /* temporary data buffer */
  45
  46 static int scsi_max_devs; /* number of highest available scsi device */
  47
  48 static int scsi_curr_dev; /* current device */
  49
  50 static block_dev_desc_t scsi_dev_desc[CONFIG_SYS_SCSI_MAX_DEVICE];
  51
  52 /********************************************************************************
  53  *  forward declerations of some Setup Routines
  54  */
  55 void scsi_setup_test_unit_ready(ccb * pccb);
  56 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks);
  57 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks);
  58 static void scsi_setup_write_ext(ccb *pccb, unsigned long start,
  59                           unsigned short blocks);
  60 void scsi_setup_inquiry(ccb * pccb);
  61 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len);
  62
  63
  64 static int scsi_read_capacity(ccb *pccb, lbaint_t *capacity,
  65                               unsigned long *blksz);
  66 static ulong scsi_read(int device, lbaint_t blknr, lbaint_t blkcnt,
  67                        void *buffer);
  68 static ulong scsi_write(int device, lbaint_t blknr,
  69                         lbaint_t blkcnt, const void *buffer);
  70
  71
  72 /*********************************************************************************
  73  * (re)-scan the scsi bus and reports scsi device info
  74  * to the user if mode = 1
  75  */
  76 void scsi_scan(int mode)
  77 {
  78         unsigned char i,perq,modi,lun;
  79         lbaint_t capacity;
  80         unsigned long blksz;
  81         ccb* pccb=(ccb *)&tempccb;
  82
  83         if(mode==1) {
  84                 printf("scanning bus for devices...\n");
  85         }
  86         for(i=0;i<CONFIG_SYS_SCSI_MAX_DEVICE;i++) {
  87                 scsi_dev_desc[i].target=0xff;
  88                 scsi_dev_desc[i].lun=0xff;
  89                 scsi_dev_desc[i].lba=0;
  90                 scsi_dev_desc[i].blksz=0;
  91                 scsi_dev_desc[i].log2blksz =
  92                         LOG2_INVALID(typeof(scsi_dev_desc[i].log2blksz));
  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                 scsi_dev_desc[i].block_write = scsi_write;
 103         }
 104         scsi_max_devs=0;
 105         for(i=0;i<CONFIG_SYS_SCSI_MAX_SCSI_ID;i++) {
 106                 pccb->target=i;
 107                 for(lun=0;lun<CONFIG_SYS_SCSI_MAX_LUN;lun++) {
 108                         pccb->lun=lun;
 109                         pccb->pdata=(unsigned char *)&tempbuff;
 110                         pccb->datalen=512;
 111                         scsi_setup_inquiry(pccb);
 112                         if (scsi_exec(pccb) != true) {
 113                                 if(pccb->contr_stat==SCSI_SEL_TIME_OUT) {
 114                                         debug ("Selection timeout ID %d\n",pccb->target);
 115                                         continue; /* selection timeout => assuming no device present */
 116                                 }
 117                                 scsi_print_error(pccb);
 118                                 continue;
 119                         }
 120                         perq=tempbuff[0];
 121                         modi=tempbuff[1];
 122                         if((perq & 0x1f)==0x1f) {
 123                                 continue; /* skip unknown devices */
 124                         }
 125                         if((modi&0x80)==0x80) /* drive is removable */
 126                                 scsi_dev_desc[scsi_max_devs].removable=true;
 127                         /* get info for this device */
 128                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].vendor[0],
 129                                        &tempbuff[8], 8);
 130                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].product[0],
 131                                        &tempbuff[16], 16);
 132                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].revision[0],
 133                                        &tempbuff[32], 4);
 134                         scsi_dev_desc[scsi_max_devs].target=pccb->target;
 135                         scsi_dev_desc[scsi_max_devs].lun=pccb->lun;
 136
 137                         pccb->datalen=0;
 138                         scsi_setup_test_unit_ready(pccb);
 139                         if (scsi_exec(pccb) != true) {
 140                                 if (scsi_dev_desc[scsi_max_devs].removable == true) {
 141                                         scsi_dev_desc[scsi_max_devs].type=perq;
 142                                         goto removable;
 143                                 }
 144                                 scsi_print_error(pccb);
 145                                 continue;
 146                         }
 147                         if (scsi_read_capacity(pccb, &capacity, &blksz)) {
 148                                 scsi_print_error(pccb);
 149                                 continue;
 150                         }
 151                         scsi_dev_desc[scsi_max_devs].lba=capacity;
 152                         scsi_dev_desc[scsi_max_devs].blksz=blksz;
 153                         scsi_dev_desc[scsi_max_devs].log2blksz =
 154                                 LOG2(scsi_dev_desc[scsi_max_devs].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         printf("Found %d device(s).\n", scsi_max_devs);
 171 #ifndef CONFIG_SPL_BUILD
 172         setenv_ulong("scsidevs", scsi_max_devs);
 173 #endif
 174 }
 175
 176 int scsi_get_disk_count(void)
 177 {
 178         return scsi_max_devs;
 179 }
 180
 181 #ifdef CONFIG_PCI
 182 void scsi_init(void)
 183 {
 184         int busdevfunc;
 185         int i;
 186         /*
 187          * Find a device from the list, this driver will support a single
 188          * controller.
 189          */
 190         for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
 191                 /* get PCI Device ID */
 192                 busdevfunc = pci_find_device(scsi_device_list[i].vendor,
 193                                              scsi_device_list[i].device,
 194                                              0);
 195                 if (busdevfunc != -1)
 196                         break;
 197         }
 198
 199         if (busdevfunc == -1) {
 200                 printf("Error: SCSI Controller(s) ");
 201                 for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
 202                         printf("%04X:%04X ",
 203                                scsi_device_list[i].vendor,
 204                                scsi_device_list[i].device);
 205                 }
 206                 printf("not found\n");
 207                 return;
 208         }
 209 #ifdef DEBUG
 210         else {
 211                 printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",
 212                        scsi_device_list[i].vendor,
 213                        scsi_device_list[i].device,
 214                        (busdevfunc >> 16) & 0xFF,
 215                        (busdevfunc >> 11) & 0x1F,
 216                        (busdevfunc >> 8) & 0x7);
 217         }
 218 #endif
 219         scsi_low_level_init(busdevfunc);
 220         scsi_scan(1);
 221 }
 222 #endif
 223
 224 #ifdef CONFIG_PARTITIONS
 225 block_dev_desc_t * scsi_get_dev(int dev)
 226 {
 227         return (dev < CONFIG_SYS_SCSI_MAX_DEVICE) ? &scsi_dev_desc[dev] : NULL;
 228 }
 229 #endif
 230
 231 /******************************************************************************
 232  * scsi boot command intepreter. Derived from diskboot
 233  */
 234 int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 235 {
 236         return common_diskboot(cmdtp, "scsi", argc, argv);
 237 }
 238
 239 /*********************************************************************************
 240  * scsi command intepreter
 241  */
 242 int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 243 {
 244         switch (argc) {
 245         case 0:
 246         case 1:
 247                 return CMD_RET_USAGE;
 248
 249         case 2:
 250                         if (strncmp(argv[1],"res",3) == 0) {
 251                                 printf("\nReset SCSI\n");
 252                                 scsi_bus_reset();
 253                                 scsi_scan(1);
 254                                 return 0;
 255                         }
 256                         if (strncmp(argv[1],"inf",3) == 0) {
 257                                 int i;
 258                                 for (i=0; i<CONFIG_SYS_SCSI_MAX_DEVICE; ++i) {
 259                                         if(scsi_dev_desc[i].type==DEV_TYPE_UNKNOWN)
 260                                                 continue; /* list only known devices */
 261                                         printf ("SCSI dev. %d:  ", i);
 262                                         dev_print(&scsi_dev_desc[i]);
 263                                 }
 264                                 return 0;
 265                         }
 266                         if (strncmp(argv[1],"dev",3) == 0) {
 267                                 if ((scsi_curr_dev < 0) || (scsi_curr_dev >= CONFIG_SYS_SCSI_MAX_DEVICE)) {
 268                                         printf("\nno SCSI devices available\n");
 269                                         return 1;
 270                                 }
 271                                 printf ("\n    Device %d: ", scsi_curr_dev);
 272                                 dev_print(&scsi_dev_desc[scsi_curr_dev]);
 273                                 return 0;
 274                         }
 275                         if (strncmp(argv[1],"scan",4) == 0) {
 276                                 scsi_scan(1);
 277                                 return 0;
 278                         }
 279                         if (strncmp(argv[1],"part",4) == 0) {
 280                                 int dev, ok;
 281                                 for (ok=0, dev=0; dev<CONFIG_SYS_SCSI_MAX_DEVICE; ++dev) {
 282                                         if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
 283                                                 ok++;
 284                                                 if (dev)
 285                                                         printf("\n");
 286                                                 debug ("print_part of %x\n",dev);
 287                                                         print_part(&scsi_dev_desc[dev]);
 288                                         }
 289                                 }
 290                                 if (!ok)
 291                                         printf("\nno SCSI devices available\n");
 292                                 return 1;
 293                         }
 294                         return CMD_RET_USAGE;
 295         case 3:
 296                         if (strncmp(argv[1],"dev",3) == 0) {
 297                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 298                                 printf ("\nSCSI device %d: ", dev);
 299                                 if (dev >= CONFIG_SYS_SCSI_MAX_DEVICE) {
 300                                         printf("unknown device\n");
 301                                         return 1;
 302                                 }
 303                                 printf ("\n    Device %d: ", dev);
 304                                 dev_print(&scsi_dev_desc[dev]);
 305                                 if(scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
 306                                         return 1;
 307                                 }
 308                                 scsi_curr_dev = dev;
 309                                 printf("... is now current device\n");
 310                                 return 0;
 311                         }
 312                         if (strncmp(argv[1],"part",4) == 0) {
 313                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 314                                 if(scsi_dev_desc[dev].type != DEV_TYPE_UNKNOWN) {
 315                                         print_part(&scsi_dev_desc[dev]);
 316                                 }
 317                                 else {
 318                                         printf ("\nSCSI device %d not available\n", dev);
 319                                 }
 320                                 return 1;
 321                         }
 322                         return CMD_RET_USAGE;
 323     default:
 324                         /* at least 4 args */
 325                         if (strcmp(argv[1],"read") == 0) {
 326                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
 327                                 ulong blk  = simple_strtoul(argv[3], NULL, 16);
 328                                 ulong cnt  = simple_strtoul(argv[4], NULL, 16);
 329                                 ulong n;
 330                                 printf ("\nSCSI read: device %d block # %ld, count %ld ... ",
 331                                                 scsi_curr_dev, blk, cnt);
 332                                 n = scsi_read(scsi_curr_dev, blk, cnt, (ulong *)addr);
 333                                 printf ("%ld blocks read: %s\n",n,(n==cnt) ? "OK" : "ERROR");
 334                                 return 0;
 335                         } else if (strcmp(argv[1], "write") == 0) {
 336                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
 337                                 ulong blk = simple_strtoul(argv[3], NULL, 16);
 338                                 ulong cnt = simple_strtoul(argv[4], NULL, 16);
 339                                 ulong n;
 340                                 printf("\nSCSI write: device %d block # %ld, "
 341                                        "count %ld ... ",
 342                                        scsi_curr_dev, blk, cnt);
 343                                 n = scsi_write(scsi_curr_dev, blk, cnt,
 344                                                (ulong *)addr);
 345                                 printf("%ld blocks written: %s\n", n,
 346                                        (n == cnt) ? "OK" : "ERROR");
 347                                 return 0;
 348                         }
 349         } /* switch */
 350         return CMD_RET_USAGE;
 351 }
 352
 353 /****************************************************************************************
 354  * scsi_read
 355  */
 356
 357 #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
 358
 359 static ulong scsi_read(int device, lbaint_t blknr, lbaint_t blkcnt,
 360                        void *buffer)
 361 {
 362         lbaint_t start, blks;
 363         uintptr_t buf_addr;
 364         unsigned short smallblks;
 365         ccb* pccb=(ccb *)&tempccb;
 366         device&=0xff;
 367         /* Setup  device
 368          */
 369         pccb->target=scsi_dev_desc[device].target;
 370         pccb->lun=scsi_dev_desc[device].lun;
 371         buf_addr=(unsigned long)buffer;
 372         start=blknr;
 373         blks=blkcnt;
 374         debug("\nscsi_read: dev %d startblk " LBAF
 375               ", blccnt " LBAF " buffer %lx\n",
 376               device, start, blks, (unsigned long)buffer);
 377         do {
 378                 pccb->pdata=(unsigned char *)buf_addr;
 379                 if(blks>SCSI_MAX_READ_BLK) {
 380                         pccb->datalen=scsi_dev_desc[device].blksz * SCSI_MAX_READ_BLK;
 381                         smallblks=SCSI_MAX_READ_BLK;
 382                         scsi_setup_read_ext(pccb,start,smallblks);
 383                         start+=SCSI_MAX_READ_BLK;
 384                         blks-=SCSI_MAX_READ_BLK;
 385                 }
 386                 else {
 387                         pccb->datalen=scsi_dev_desc[device].blksz * blks;
 388                         smallblks=(unsigned short) blks;
 389                         scsi_setup_read_ext(pccb,start,smallblks);
 390                         start+=blks;
 391                         blks=0;
 392                 }
 393                 debug("scsi_read_ext: startblk " LBAF
 394                       ", blccnt %x buffer %lx\n",
 395                       start, smallblks, buf_addr);
 396                 if (scsi_exec(pccb) != true) {
 397                         scsi_print_error(pccb);
 398                         blkcnt-=blks;
 399                         break;
 400                 }
 401                 buf_addr+=pccb->datalen;
 402         } while(blks!=0);
 403         debug("scsi_read_ext: end startblk " LBAF
 404               ", blccnt %x buffer %lx\n", start, smallblks, buf_addr);
 405         return(blkcnt);
 406 }
 407
 408 /*******************************************************************************
 409  * scsi_write
 410  */
 411
 412 /* Almost the maximum amount of the scsi_ext command.. */
 413 #define SCSI_MAX_WRITE_BLK 0xFFFF
 414
 415 static ulong scsi_write(int device, lbaint_t blknr,
 416                         lbaint_t blkcnt, const void *buffer)
 417 {
 418         lbaint_t start, blks;
 419         uintptr_t buf_addr;
 420         unsigned short smallblks;
 421         ccb* pccb = (ccb *)&tempccb;
 422         device &= 0xff;
 423         /* Setup  device
 424          */
 425         pccb->target = scsi_dev_desc[device].target;
 426         pccb->lun = scsi_dev_desc[device].lun;
 427         buf_addr = (unsigned long)buffer;
 428         start = blknr;
 429         blks = blkcnt;
 430         debug("\n%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n",
 431               __func__, device, start, blks, (unsigned long)buffer);
 432         do {
 433                 pccb->pdata = (unsigned char *)buf_addr;
 434                 if (blks > SCSI_MAX_WRITE_BLK) {
 435                         pccb->datalen = (scsi_dev_desc[device].blksz *
 436                                          SCSI_MAX_WRITE_BLK);
 437                         smallblks = SCSI_MAX_WRITE_BLK;
 438                         scsi_setup_write_ext(pccb, start, smallblks);
 439                         start += SCSI_MAX_WRITE_BLK;
 440                         blks -= SCSI_MAX_WRITE_BLK;
 441                 } else {
 442                         pccb->datalen = scsi_dev_desc[device].blksz * blks;
 443                         smallblks = (unsigned short)blks;
 444                         scsi_setup_write_ext(pccb, start, smallblks);
 445                         start += blks;
 446                         blks = 0;
 447                 }
 448                 debug("%s: startblk " LBAF ", blccnt %x buffer %lx\n",
 449                       __func__, start, smallblks, buf_addr);
 450                 if (scsi_exec(pccb) != true) {
 451                         scsi_print_error(pccb);
 452                         blkcnt -= blks;
 453                         break;
 454                 }
 455                 buf_addr += pccb->datalen;
 456         } while (blks != 0);
 457         debug("%s: end startblk " LBAF ", blccnt %x buffer %lx\n",
 458               __func__, start, smallblks, buf_addr);
 459         return blkcnt;
 460 }
 461
 462 /* copy src to dest, skipping leading and trailing blanks
 463  * and null terminate the string
 464  */
 465 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len)
 466 {
 467         int start,end;
 468
 469         start=0;
 470         while(start<len) {
 471                 if(src[start]!=' ')
 472                         break;
 473                 start++;
 474         }
 475         end=len-1;
 476         while(end>start) {
 477                 if(src[end]!=' ')
 478                         break;
 479                 end--;
 480         }
 481         for( ; start<=end; start++) {
 482                 *dest++=src[start];
 483         }
 484         *dest='\0';
 485 }
 486
 487
 488 /* Trim trailing blanks, and NUL-terminate string
 489  */
 490 void scsi_trim_trail (unsigned char *str, unsigned int len)
 491 {
 492         unsigned char *p = str + len - 1;
 493
 494         while (len-- > 0) {
 495                 *p-- = '\0';
 496                 if (*p != ' ') {
 497                         return;
 498                 }
 499         }
 500 }
 501
 502 int scsi_read_capacity(ccb *pccb, lbaint_t *capacity, unsigned long *blksz)
 503 {
 504         *capacity = 0;
 505
 506         memset(pccb->cmd, 0, sizeof(pccb->cmd));
 507         pccb->cmd[0] = SCSI_RD_CAPAC10;
 508         pccb->cmd[1] = pccb->lun << 5;
 509         pccb->cmdlen = 10;
 510         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 511
 512         pccb->datalen = 8;
 513         if (scsi_exec(pccb) != true)
 514                 return 1;
 515
 516         *capacity = ((lbaint_t)pccb->pdata[0] << 24) |
 517                     ((lbaint_t)pccb->pdata[1] << 16) |
 518                     ((lbaint_t)pccb->pdata[2] << 8)  |
 519                     ((lbaint_t)pccb->pdata[3]);
 520
 521         if (*capacity != 0xffffffff) {
 522                 /* Read capacity (10) was sufficient for this drive. */
 523                 *blksz = ((unsigned long)pccb->pdata[4] << 24) |
 524                          ((unsigned long)pccb->pdata[5] << 16) |
 525                          ((unsigned long)pccb->pdata[6] << 8)  |
 526                          ((unsigned long)pccb->pdata[7]);
 527                 return 0;
 528         }
 529
 530         /* Read capacity (10) was insufficient. Use read capacity (16). */
 531
 532         memset(pccb->cmd, 0, sizeof(pccb->cmd));
 533         pccb->cmd[0] = SCSI_RD_CAPAC16;
 534         pccb->cmd[1] = 0x10;
 535         pccb->cmdlen = 16;
 536         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 537
 538         pccb->datalen = 16;
 539         if (scsi_exec(pccb) != true)
 540                 return 1;
 541
 542         *capacity = ((uint64_t)pccb->pdata[0] << 56) |
 543                     ((uint64_t)pccb->pdata[1] << 48) |
 544                     ((uint64_t)pccb->pdata[2] << 40) |
 545                     ((uint64_t)pccb->pdata[3] << 32) |
 546                     ((uint64_t)pccb->pdata[4] << 24) |
 547                     ((uint64_t)pccb->pdata[5] << 16) |
 548                     ((uint64_t)pccb->pdata[6] << 8)  |
 549                     ((uint64_t)pccb->pdata[7]);
 550
 551         *blksz = ((uint64_t)pccb->pdata[8]  << 56) |
 552                  ((uint64_t)pccb->pdata[9]  << 48) |
 553                  ((uint64_t)pccb->pdata[10] << 40) |
 554                  ((uint64_t)pccb->pdata[11] << 32) |
 555                  ((uint64_t)pccb->pdata[12] << 24) |
 556                  ((uint64_t)pccb->pdata[13] << 16) |
 557                  ((uint64_t)pccb->pdata[14] << 8)  |
 558                  ((uint64_t)pccb->pdata[15]);
 559
 560         return 0;
 561 }
 562
 563
 564 /************************************************************************************
 565  * Some setup (fill-in) routines
 566  */
 567 void scsi_setup_test_unit_ready(ccb * pccb)
 568 {
 569         pccb->cmd[0]=SCSI_TST_U_RDY;
 570         pccb->cmd[1]=pccb->lun<<5;
 571         pccb->cmd[2]=0;
 572         pccb->cmd[3]=0;
 573         pccb->cmd[4]=0;
 574         pccb->cmd[5]=0;
 575         pccb->cmdlen=6;
 576         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 577 }
 578
 579 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks)
 580 {
 581         pccb->cmd[0]=SCSI_READ10;
 582         pccb->cmd[1]=pccb->lun<<5;
 583         pccb->cmd[2]=((unsigned char) (start>>24))&0xff;
 584         pccb->cmd[3]=((unsigned char) (start>>16))&0xff;
 585         pccb->cmd[4]=((unsigned char) (start>>8))&0xff;
 586         pccb->cmd[5]=((unsigned char) (start))&0xff;
 587         pccb->cmd[6]=0;
 588         pccb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
 589         pccb->cmd[8]=(unsigned char) blocks & 0xff;
 590         pccb->cmd[6]=0;
 591         pccb->cmdlen=10;
 592         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 593         debug ("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 594                 pccb->cmd[0],pccb->cmd[1],
 595                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4],pccb->cmd[5],
 596                 pccb->cmd[7],pccb->cmd[8]);
 597 }
 598
 599 void scsi_setup_write_ext(ccb *pccb, unsigned long start, unsigned short blocks)
 600 {
 601         pccb->cmd[0] = SCSI_WRITE10;
 602         pccb->cmd[1] = pccb->lun << 5;
 603         pccb->cmd[2] = ((unsigned char) (start>>24)) & 0xff;
 604         pccb->cmd[3] = ((unsigned char) (start>>16)) & 0xff;
 605         pccb->cmd[4] = ((unsigned char) (start>>8)) & 0xff;
 606         pccb->cmd[5] = ((unsigned char) (start)) & 0xff;
 607         pccb->cmd[6] = 0;
 608         pccb->cmd[7] = ((unsigned char) (blocks>>8)) & 0xff;
 609         pccb->cmd[8] = (unsigned char)blocks & 0xff;
 610         pccb->cmd[9] = 0;
 611         pccb->cmdlen = 10;
 612         pccb->msgout[0] = SCSI_IDENTIFY;  /* NOT USED */
 613         debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 614               __func__,
 615               pccb->cmd[0], pccb->cmd[1],
 616               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
 617               pccb->cmd[7], pccb->cmd[8]);
 618 }
 619
 620 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks)
 621 {
 622         pccb->cmd[0]=SCSI_READ6;
 623         pccb->cmd[1]=pccb->lun<<5 | (((unsigned char)(start>>16))&0x1f);
 624         pccb->cmd[2]=((unsigned char) (start>>8))&0xff;
 625         pccb->cmd[3]=((unsigned char) (start))&0xff;
 626         pccb->cmd[4]=(unsigned char) blocks & 0xff;
 627         pccb->cmd[5]=0;
 628         pccb->cmdlen=6;
 629         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 630         debug ("scsi_setup_read6: cmd: %02X %02X startblk %02X%02X blccnt %02X\n",
 631                 pccb->cmd[0],pccb->cmd[1],
 632                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4]);
 633 }
 634
 635
 636 void scsi_setup_inquiry(ccb * pccb)
 637 {
 638         pccb->cmd[0]=SCSI_INQUIRY;
 639         pccb->cmd[1]=pccb->lun<<5;
 640         pccb->cmd[2]=0;
 641         pccb->cmd[3]=0;
 642         if(pccb->datalen>255)
 643                 pccb->cmd[4]=255;
 644         else
 645                 pccb->cmd[4]=(unsigned char)pccb->datalen;
 646         pccb->cmd[5]=0;
 647         pccb->cmdlen=6;
 648         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 649 }
 650
 651
 652 U_BOOT_CMD(
 653         scsi, 5, 1, do_scsi,
 654         "SCSI sub-system",
 655         "reset - reset SCSI controller\n"
 656         "scsi info  - show available SCSI devices\n"
 657         "scsi scan  - (re-)scan SCSI bus\n"
 658         "scsi device [dev] - show or set current device\n"
 659         "scsi part [dev] - print partition table of one or all SCSI devices\n"
 660         "scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 661         "     to memory address `addr'\n"
 662         "scsi write addr blk# cnt - write `cnt' blocks starting at block\n"
 663         "     `blk#' from memory address `addr'"
 664 );
 665
 666 U_BOOT_CMD(
 667         scsiboot, 3, 1, do_scsiboot,
 668         "boot from SCSI device",
 669         "loadAddr dev:part"
 670 );