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 <inttypes.h>
  14 #include <asm/processor.h>
  15 #include <scsi.h>
  16 #include <image.h>
  17 #include <pci.h>
  18
  19 #ifdef CONFIG_SCSI_DEV_LIST
  20 #define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
  21 #else
  22 #ifdef CONFIG_SCSI_SYM53C8XX
  23 #define SCSI_VEND_ID    0x1000
  24 #ifndef CONFIG_SCSI_DEV_ID
  25 #define SCSI_DEV_ID             0x0001
  26 #else
  27 #define SCSI_DEV_ID             CONFIG_SCSI_DEV_ID
  28 #endif
  29 #elif defined CONFIG_SATA_ULI5288
  30
  31 #define SCSI_VEND_ID 0x10b9
  32 #define SCSI_DEV_ID  0x5288
  33
  34 #elif !defined(CONFIG_SCSI_AHCI_PLAT)
  35 #error no scsi device defined
  36 #endif
  37 #define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
  38 #endif
  39
  40 #ifdef CONFIG_PCI
  41 const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
  42 #endif
  43 static ccb tempccb;     /* temporary scsi command buffer */
  44
  45 static unsigned char tempbuff[512]; /* temporary data buffer */
  46
  47 static int scsi_max_devs; /* number of highest available scsi device */
  48
  49 static int scsi_curr_dev; /* current device */
  50
  51 static block_dev_desc_t scsi_dev_desc[CONFIG_SYS_SCSI_MAX_DEVICE];
  52
  53 /********************************************************************************
  54  *  forward declerations of some Setup Routines
  55  */
  56 void scsi_setup_test_unit_ready(ccb * pccb);
  57 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks);
  58 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks);
  59 static void scsi_setup_write_ext(ccb *pccb, unsigned long start,
  60                           unsigned short blocks);
  61 void scsi_setup_inquiry(ccb * pccb);
  62 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len);
  63
  64
  65 static int scsi_read_capacity(ccb *pccb, lbaint_t *capacity,
  66                               unsigned long *blksz);
  67 static ulong scsi_read(int device, lbaint_t blknr, lbaint_t blkcnt,
  68                        void *buffer);
  69 static ulong scsi_write(int device, lbaint_t blknr,
  70                         lbaint_t blkcnt, const void *buffer);
  71
  72
  73 /*********************************************************************************
  74  * (re)-scan the scsi bus and reports scsi device info
  75  * to the user if mode = 1
  76  */
  77 void scsi_scan(int mode)
  78 {
  79         unsigned char i,perq,modi,lun;
  80         lbaint_t capacity;
  81         unsigned long blksz;
  82         ccb* pccb=(ccb *)&tempccb;
  83
  84         if(mode==1) {
  85                 printf("scanning bus for devices...\n");
  86         }
  87         for(i=0;i<CONFIG_SYS_SCSI_MAX_DEVICE;i++) {
  88                 scsi_dev_desc[i].target=0xff;
  89                 scsi_dev_desc[i].lun=0xff;
  90                 scsi_dev_desc[i].lba=0;
  91                 scsi_dev_desc[i].blksz=0;
  92                 scsi_dev_desc[i].log2blksz =
  93                         LOG2_INVALID(typeof(scsi_dev_desc[i].log2blksz));
  94                 scsi_dev_desc[i].type=DEV_TYPE_UNKNOWN;
  95                 scsi_dev_desc[i].vendor[0]=0;
  96                 scsi_dev_desc[i].product[0]=0;
  97                 scsi_dev_desc[i].revision[0]=0;
  98                 scsi_dev_desc[i].removable = false;
  99                 scsi_dev_desc[i].if_type=IF_TYPE_SCSI;
 100                 scsi_dev_desc[i].dev=i;
 101                 scsi_dev_desc[i].part_type=PART_TYPE_UNKNOWN;
 102                 scsi_dev_desc[i].block_read=scsi_read;
 103                 scsi_dev_desc[i].block_write = scsi_write;
 104         }
 105         scsi_max_devs=0;
 106         for(i=0;i<CONFIG_SYS_SCSI_MAX_SCSI_ID;i++) {
 107                 pccb->target=i;
 108                 for(lun=0;lun<CONFIG_SYS_SCSI_MAX_LUN;lun++) {
 109                         pccb->lun=lun;
 110                         pccb->pdata=(unsigned char *)&tempbuff;
 111                         pccb->datalen=512;
 112                         scsi_setup_inquiry(pccb);
 113                         if (scsi_exec(pccb) != true) {
 114                                 if(pccb->contr_stat==SCSI_SEL_TIME_OUT) {
 115                                         debug ("Selection timeout ID %d\n",pccb->target);
 116                                         continue; /* selection timeout => assuming no device present */
 117                                 }
 118                                 scsi_print_error(pccb);
 119                                 continue;
 120                         }
 121                         perq=tempbuff[0];
 122                         modi=tempbuff[1];
 123                         if((perq & 0x1f)==0x1f) {
 124                                 continue; /* skip unknown devices */
 125                         }
 126                         if((modi&0x80)==0x80) /* drive is removable */
 127                                 scsi_dev_desc[scsi_max_devs].removable=true;
 128                         /* get info for this device */
 129                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].vendor[0],
 130                                        &tempbuff[8], 8);
 131                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].product[0],
 132                                        &tempbuff[16], 16);
 133                         scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].revision[0],
 134                                        &tempbuff[32], 4);
 135                         scsi_dev_desc[scsi_max_devs].target=pccb->target;
 136                         scsi_dev_desc[scsi_max_devs].lun=pccb->lun;
 137
 138                         pccb->datalen=0;
 139                         scsi_setup_test_unit_ready(pccb);
 140                         if (scsi_exec(pccb) != true) {
 141                                 if (scsi_dev_desc[scsi_max_devs].removable == true) {
 142                                         scsi_dev_desc[scsi_max_devs].type=perq;
 143                                         goto removable;
 144                                 }
 145                                 scsi_print_error(pccb);
 146                                 continue;
 147                         }
 148                         if (scsi_read_capacity(pccb, &capacity, &blksz)) {
 149                                 scsi_print_error(pccb);
 150                                 continue;
 151                         }
 152                         scsi_dev_desc[scsi_max_devs].lba=capacity;
 153                         scsi_dev_desc[scsi_max_devs].blksz=blksz;
 154                         scsi_dev_desc[scsi_max_devs].log2blksz =
 155                                 LOG2(scsi_dev_desc[scsi_max_devs].blksz);
 156                         scsi_dev_desc[scsi_max_devs].type=perq;
 157                         init_part(&scsi_dev_desc[scsi_max_devs]);
 158 removable:
 159                         if(mode==1) {
 160                                 printf ("  Device %d: ", scsi_max_devs);
 161                                 dev_print(&scsi_dev_desc[scsi_max_devs]);
 162                         } /* if mode */
 163                         scsi_max_devs++;
 164                 } /* next LUN */
 165         }
 166         if(scsi_max_devs>0)
 167                 scsi_curr_dev=0;
 168         else
 169                 scsi_curr_dev = -1;
 170
 171         printf("Found %d device(s).\n", scsi_max_devs);
 172 #ifndef CONFIG_SPL_BUILD
 173         setenv_ulong("scsidevs", scsi_max_devs);
 174 #endif
 175 }
 176
 177 int scsi_get_disk_count(void)
 178 {
 179         return scsi_max_devs;
 180 }
 181
 182 #ifdef CONFIG_PCI
 183 void scsi_init(void)
 184 {
 185         int busdevfunc;
 186         int i;
 187         /*
 188          * Find a device from the list, this driver will support a single
 189          * controller.
 190          */
 191         for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
 192                 /* get PCI Device ID */
 193                 busdevfunc = pci_find_device(scsi_device_list[i].vendor,
 194                                              scsi_device_list[i].device,
 195                                              0);
 196                 if (busdevfunc != -1)
 197                         break;
 198         }
 199
 200         if (busdevfunc == -1) {
 201                 printf("Error: SCSI Controller(s) ");
 202                 for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
 203                         printf("%04X:%04X ",
 204                                scsi_device_list[i].vendor,
 205                                scsi_device_list[i].device);
 206                 }
 207                 printf("not found\n");
 208                 return;
 209         }
 210 #ifdef DEBUG
 211         else {
 212                 printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",
 213                        scsi_device_list[i].vendor,
 214                        scsi_device_list[i].device,
 215                        (busdevfunc >> 16) & 0xFF,
 216                        (busdevfunc >> 11) & 0x1F,
 217                        (busdevfunc >> 8) & 0x7);
 218         }
 219 #endif
 220         scsi_low_level_init(busdevfunc);
 221         scsi_scan(1);
 222 }
 223 #endif
 224
 225 #ifdef CONFIG_PARTITIONS
 226 block_dev_desc_t * scsi_get_dev(int dev)
 227 {
 228         return (dev < CONFIG_SYS_SCSI_MAX_DEVICE) ? &scsi_dev_desc[dev] : NULL;
 229 }
 230 #endif
 231
 232 /******************************************************************************
 233  * scsi boot command intepreter. Derived from diskboot
 234  */
 235 int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 236 {
 237         return common_diskboot(cmdtp, "scsi", argc, argv);
 238 }
 239
 240 /*********************************************************************************
 241  * scsi command intepreter
 242  */
 243 int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 244 {
 245         switch (argc) {
 246         case 0:
 247         case 1:
 248                 return CMD_RET_USAGE;
 249
 250         case 2:
 251                         if (strncmp(argv[1],"res",3) == 0) {
 252                                 printf("\nReset SCSI\n");
 253                                 scsi_bus_reset();
 254                                 scsi_scan(1);
 255                                 return 0;
 256                         }
 257                         if (strncmp(argv[1],"inf",3) == 0) {
 258                                 int i;
 259                                 for (i=0; i<CONFIG_SYS_SCSI_MAX_DEVICE; ++i) {
 260                                         if(scsi_dev_desc[i].type==DEV_TYPE_UNKNOWN)
 261                                                 continue; /* list only known devices */
 262                                         printf ("SCSI dev. %d:  ", i);
 263                                         dev_print(&scsi_dev_desc[i]);
 264                                 }
 265                                 return 0;
 266                         }
 267                         if (strncmp(argv[1],"dev",3) == 0) {
 268                                 if ((scsi_curr_dev < 0) || (scsi_curr_dev >= CONFIG_SYS_SCSI_MAX_DEVICE)) {
 269                                         printf("\nno SCSI devices available\n");
 270                                         return 1;
 271                                 }
 272                                 printf ("\n    Device %d: ", scsi_curr_dev);
 273                                 dev_print(&scsi_dev_desc[scsi_curr_dev]);
 274                                 return 0;
 275                         }
 276                         if (strncmp(argv[1],"scan",4) == 0) {
 277                                 scsi_scan(1);
 278                                 return 0;
 279                         }
 280                         if (strncmp(argv[1],"part",4) == 0) {
 281                                 int dev, ok;
 282                                 for (ok=0, dev=0; dev<CONFIG_SYS_SCSI_MAX_DEVICE; ++dev) {
 283                                         if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
 284                                                 ok++;
 285                                                 if (dev)
 286                                                         printf("\n");
 287                                                 debug ("print_part of %x\n",dev);
 288                                                         print_part(&scsi_dev_desc[dev]);
 289                                         }
 290                                 }
 291                                 if (!ok)
 292                                         printf("\nno SCSI devices available\n");
 293                                 return 1;
 294                         }
 295                         return CMD_RET_USAGE;
 296         case 3:
 297                         if (strncmp(argv[1],"dev",3) == 0) {
 298                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 299                                 printf ("\nSCSI device %d: ", dev);
 300                                 if (dev >= CONFIG_SYS_SCSI_MAX_DEVICE) {
 301                                         printf("unknown device\n");
 302                                         return 1;
 303                                 }
 304                                 printf ("\n    Device %d: ", dev);
 305                                 dev_print(&scsi_dev_desc[dev]);
 306                                 if(scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
 307                                         return 1;
 308                                 }
 309                                 scsi_curr_dev = dev;
 310                                 printf("... is now current device\n");
 311                                 return 0;
 312                         }
 313                         if (strncmp(argv[1],"part",4) == 0) {
 314                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 315                                 if(scsi_dev_desc[dev].type != DEV_TYPE_UNKNOWN) {
 316                                         print_part(&scsi_dev_desc[dev]);
 317                                 }
 318                                 else {
 319                                         printf ("\nSCSI device %d not available\n", dev);
 320                                 }
 321                                 return 1;
 322                         }
 323                         return CMD_RET_USAGE;
 324     default:
 325                         /* at least 4 args */
 326                         if (strcmp(argv[1],"read") == 0) {
 327                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
 328                                 ulong blk  = simple_strtoul(argv[3], NULL, 16);
 329                                 ulong cnt  = simple_strtoul(argv[4], NULL, 16);
 330                                 ulong n;
 331                                 printf ("\nSCSI read: device %d block # %ld, count %ld ... ",
 332                                                 scsi_curr_dev, blk, cnt);
 333                                 n = scsi_read(scsi_curr_dev, blk, cnt, (ulong *)addr);
 334                                 printf ("%ld blocks read: %s\n",n,(n==cnt) ? "OK" : "ERROR");
 335                                 return 0;
 336                         } else if (strcmp(argv[1], "write") == 0) {
 337                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
 338                                 ulong blk = simple_strtoul(argv[3], NULL, 16);
 339                                 ulong cnt = simple_strtoul(argv[4], NULL, 16);
 340                                 ulong n;
 341                                 printf("\nSCSI write: device %d block # %ld, "
 342                                        "count %ld ... ",
 343                                        scsi_curr_dev, blk, cnt);
 344                                 n = scsi_write(scsi_curr_dev, blk, cnt,
 345                                                (ulong *)addr);
 346                                 printf("%ld blocks written: %s\n", n,
 347                                        (n == cnt) ? "OK" : "ERROR");
 348                                 return 0;
 349                         }
 350         } /* switch */
 351         return CMD_RET_USAGE;
 352 }
 353
 354 /****************************************************************************************
 355  * scsi_read
 356  */
 357
 358 #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
 359
 360 static ulong scsi_read(int device, lbaint_t blknr, lbaint_t blkcnt,
 361                        void *buffer)
 362 {
 363         lbaint_t start, blks;
 364         uintptr_t buf_addr;
 365         unsigned short smallblks;
 366         ccb* pccb=(ccb *)&tempccb;
 367         device&=0xff;
 368         /* Setup  device
 369          */
 370         pccb->target=scsi_dev_desc[device].target;
 371         pccb->lun=scsi_dev_desc[device].lun;
 372         buf_addr=(unsigned long)buffer;
 373         start=blknr;
 374         blks=blkcnt;
 375         debug("\nscsi_read: dev %d startblk " LBAF
 376               ", blccnt " LBAF " buffer %lx\n",
 377               device, start, blks, (unsigned long)buffer);
 378         do {
 379                 pccb->pdata=(unsigned char *)buf_addr;
 380                 if(blks>SCSI_MAX_READ_BLK) {
 381                         pccb->datalen=scsi_dev_desc[device].blksz * SCSI_MAX_READ_BLK;
 382                         smallblks=SCSI_MAX_READ_BLK;
 383                         scsi_setup_read_ext(pccb,start,smallblks);
 384                         start+=SCSI_MAX_READ_BLK;
 385                         blks-=SCSI_MAX_READ_BLK;
 386                 }
 387                 else {
 388                         pccb->datalen=scsi_dev_desc[device].blksz * blks;
 389                         smallblks=(unsigned short) blks;
 390                         scsi_setup_read_ext(pccb,start,smallblks);
 391                         start+=blks;
 392                         blks=0;
 393                 }
 394                 debug("scsi_read_ext: startblk " LBAF
 395                       ", blccnt %x buffer %" PRIXPTR "\n",
 396                       start, smallblks, buf_addr);
 397                 if (scsi_exec(pccb) != true) {
 398                         scsi_print_error(pccb);
 399                         blkcnt-=blks;
 400                         break;
 401                 }
 402                 buf_addr+=pccb->datalen;
 403         } while(blks!=0);
 404         debug("scsi_read_ext: end startblk " LBAF
 405               ", blccnt %x buffer %" PRIXPTR "\n", start, smallblks, buf_addr);
 406         return(blkcnt);
 407 }
 408
 409 /*******************************************************************************
 410  * scsi_write
 411  */
 412
 413 /* Almost the maximum amount of the scsi_ext command.. */
 414 #define SCSI_MAX_WRITE_BLK 0xFFFF
 415
 416 static ulong scsi_write(int device, lbaint_t blknr,
 417                         lbaint_t blkcnt, const void *buffer)
 418 {
 419         lbaint_t start, blks;
 420         uintptr_t buf_addr;
 421         unsigned short smallblks;
 422         ccb* pccb = (ccb *)&tempccb;
 423         device &= 0xff;
 424         /* Setup  device
 425          */
 426         pccb->target = scsi_dev_desc[device].target;
 427         pccb->lun = scsi_dev_desc[device].lun;
 428         buf_addr = (unsigned long)buffer;
 429         start = blknr;
 430         blks = blkcnt;
 431         debug("\n%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n",
 432               __func__, device, start, blks, (unsigned long)buffer);
 433         do {
 434                 pccb->pdata = (unsigned char *)buf_addr;
 435                 if (blks > SCSI_MAX_WRITE_BLK) {
 436                         pccb->datalen = (scsi_dev_desc[device].blksz *
 437                                          SCSI_MAX_WRITE_BLK);
 438                         smallblks = SCSI_MAX_WRITE_BLK;
 439                         scsi_setup_write_ext(pccb, start, smallblks);
 440                         start += SCSI_MAX_WRITE_BLK;
 441                         blks -= SCSI_MAX_WRITE_BLK;
 442                 } else {
 443                         pccb->datalen = scsi_dev_desc[device].blksz * blks;
 444                         smallblks = (unsigned short)blks;
 445                         scsi_setup_write_ext(pccb, start, smallblks);
 446                         start += blks;
 447                         blks = 0;
 448                 }
 449                 debug("%s: startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
 450                       __func__, start, smallblks, buf_addr);
 451                 if (scsi_exec(pccb) != true) {
 452                         scsi_print_error(pccb);
 453                         blkcnt -= blks;
 454                         break;
 455                 }
 456                 buf_addr += pccb->datalen;
 457         } while (blks != 0);
 458         debug("%s: end startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
 459               __func__, start, smallblks, buf_addr);
 460         return blkcnt;
 461 }
 462
 463 /* copy src to dest, skipping leading and trailing blanks
 464  * and null terminate the string
 465  */
 466 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len)
 467 {
 468         int start,end;
 469
 470         start=0;
 471         while(start<len) {
 472                 if(src[start]!=' ')
 473                         break;
 474                 start++;
 475         }
 476         end=len-1;
 477         while(end>start) {
 478                 if(src[end]!=' ')
 479                         break;
 480                 end--;
 481         }
 482         for( ; start<=end; start++) {
 483                 *dest++=src[start];
 484         }
 485         *dest='\0';
 486 }
 487
 488
 489 /* Trim trailing blanks, and NUL-terminate string
 490  */
 491 void scsi_trim_trail (unsigned char *str, unsigned int len)
 492 {
 493         unsigned char *p = str + len - 1;
 494
 495         while (len-- > 0) {
 496                 *p-- = '\0';
 497                 if (*p != ' ') {
 498                         return;
 499                 }
 500         }
 501 }
 502
 503 int scsi_read_capacity(ccb *pccb, lbaint_t *capacity, unsigned long *blksz)
 504 {
 505         *capacity = 0;
 506
 507         memset(pccb->cmd, 0, sizeof(pccb->cmd));
 508         pccb->cmd[0] = SCSI_RD_CAPAC10;
 509         pccb->cmd[1] = pccb->lun << 5;
 510         pccb->cmdlen = 10;
 511         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 512
 513         pccb->datalen = 8;
 514         if (scsi_exec(pccb) != true)
 515                 return 1;
 516
 517         *capacity = ((lbaint_t)pccb->pdata[0] << 24) |
 518                     ((lbaint_t)pccb->pdata[1] << 16) |
 519                     ((lbaint_t)pccb->pdata[2] << 8)  |
 520                     ((lbaint_t)pccb->pdata[3]);
 521
 522         if (*capacity != 0xffffffff) {
 523                 /* Read capacity (10) was sufficient for this drive. */
 524                 *blksz = ((unsigned long)pccb->pdata[4] << 24) |
 525                          ((unsigned long)pccb->pdata[5] << 16) |
 526                          ((unsigned long)pccb->pdata[6] << 8)  |
 527                          ((unsigned long)pccb->pdata[7]);
 528                 return 0;
 529         }
 530
 531         /* Read capacity (10) was insufficient. Use read capacity (16). */
 532
 533         memset(pccb->cmd, 0, sizeof(pccb->cmd));
 534         pccb->cmd[0] = SCSI_RD_CAPAC16;
 535         pccb->cmd[1] = 0x10;
 536         pccb->cmdlen = 16;
 537         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 538
 539         pccb->datalen = 16;
 540         if (scsi_exec(pccb) != true)
 541                 return 1;
 542
 543         *capacity = ((uint64_t)pccb->pdata[0] << 56) |
 544                     ((uint64_t)pccb->pdata[1] << 48) |
 545                     ((uint64_t)pccb->pdata[2] << 40) |
 546                     ((uint64_t)pccb->pdata[3] << 32) |
 547                     ((uint64_t)pccb->pdata[4] << 24) |
 548                     ((uint64_t)pccb->pdata[5] << 16) |
 549                     ((uint64_t)pccb->pdata[6] << 8)  |
 550                     ((uint64_t)pccb->pdata[7]);
 551
 552         *blksz = ((uint64_t)pccb->pdata[8]  << 56) |
 553                  ((uint64_t)pccb->pdata[9]  << 48) |
 554                  ((uint64_t)pccb->pdata[10] << 40) |
 555                  ((uint64_t)pccb->pdata[11] << 32) |
 556                  ((uint64_t)pccb->pdata[12] << 24) |
 557                  ((uint64_t)pccb->pdata[13] << 16) |
 558                  ((uint64_t)pccb->pdata[14] << 8)  |
 559                  ((uint64_t)pccb->pdata[15]);
 560
 561         return 0;
 562 }
 563
 564
 565 /************************************************************************************
 566  * Some setup (fill-in) routines
 567  */
 568 void scsi_setup_test_unit_ready(ccb * pccb)
 569 {
 570         pccb->cmd[0]=SCSI_TST_U_RDY;
 571         pccb->cmd[1]=pccb->lun<<5;
 572         pccb->cmd[2]=0;
 573         pccb->cmd[3]=0;
 574         pccb->cmd[4]=0;
 575         pccb->cmd[5]=0;
 576         pccb->cmdlen=6;
 577         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 578 }
 579
 580 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks)
 581 {
 582         pccb->cmd[0]=SCSI_READ10;
 583         pccb->cmd[1]=pccb->lun<<5;
 584         pccb->cmd[2]=((unsigned char) (start>>24))&0xff;
 585         pccb->cmd[3]=((unsigned char) (start>>16))&0xff;
 586         pccb->cmd[4]=((unsigned char) (start>>8))&0xff;
 587         pccb->cmd[5]=((unsigned char) (start))&0xff;
 588         pccb->cmd[6]=0;
 589         pccb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
 590         pccb->cmd[8]=(unsigned char) blocks & 0xff;
 591         pccb->cmd[6]=0;
 592         pccb->cmdlen=10;
 593         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 594         debug ("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 595                 pccb->cmd[0],pccb->cmd[1],
 596                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4],pccb->cmd[5],
 597                 pccb->cmd[7],pccb->cmd[8]);
 598 }
 599
 600 void scsi_setup_write_ext(ccb *pccb, unsigned long start, unsigned short blocks)
 601 {
 602         pccb->cmd[0] = SCSI_WRITE10;
 603         pccb->cmd[1] = pccb->lun << 5;
 604         pccb->cmd[2] = ((unsigned char) (start>>24)) & 0xff;
 605         pccb->cmd[3] = ((unsigned char) (start>>16)) & 0xff;
 606         pccb->cmd[4] = ((unsigned char) (start>>8)) & 0xff;
 607         pccb->cmd[5] = ((unsigned char) (start)) & 0xff;
 608         pccb->cmd[6] = 0;
 609         pccb->cmd[7] = ((unsigned char) (blocks>>8)) & 0xff;
 610         pccb->cmd[8] = (unsigned char)blocks & 0xff;
 611         pccb->cmd[9] = 0;
 612         pccb->cmdlen = 10;
 613         pccb->msgout[0] = SCSI_IDENTIFY;  /* NOT USED */
 614         debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 615               __func__,
 616               pccb->cmd[0], pccb->cmd[1],
 617               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
 618               pccb->cmd[7], pccb->cmd[8]);
 619 }
 620
 621 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks)
 622 {
 623         pccb->cmd[0]=SCSI_READ6;
 624         pccb->cmd[1]=pccb->lun<<5 | (((unsigned char)(start>>16))&0x1f);
 625         pccb->cmd[2]=((unsigned char) (start>>8))&0xff;
 626         pccb->cmd[3]=((unsigned char) (start))&0xff;
 627         pccb->cmd[4]=(unsigned char) blocks & 0xff;
 628         pccb->cmd[5]=0;
 629         pccb->cmdlen=6;
 630         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 631         debug ("scsi_setup_read6: cmd: %02X %02X startblk %02X%02X blccnt %02X\n",
 632                 pccb->cmd[0],pccb->cmd[1],
 633                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4]);
 634 }
 635
 636
 637 void scsi_setup_inquiry(ccb * pccb)
 638 {
 639         pccb->cmd[0]=SCSI_INQUIRY;
 640         pccb->cmd[1]=pccb->lun<<5;
 641         pccb->cmd[2]=0;
 642         pccb->cmd[3]=0;
 643         if(pccb->datalen>255)
 644                 pccb->cmd[4]=255;
 645         else
 646                 pccb->cmd[4]=(unsigned char)pccb->datalen;
 647         pccb->cmd[5]=0;
 648         pccb->cmdlen=6;
 649         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 650 }
 651
 652
 653 U_BOOT_CMD(
 654         scsi, 5, 1, do_scsi,
 655         "SCSI sub-system",
 656         "reset - reset SCSI controller\n"
 657         "scsi info  - show available SCSI devices\n"
 658         "scsi scan  - (re-)scan SCSI bus\n"
 659         "scsi device [dev] - show or set current device\n"
 660         "scsi part [dev] - print partition table of one or all SCSI devices\n"
 661         "scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 662         "     to memory address `addr'\n"
 663         "scsi write addr blk# cnt - write `cnt' blocks starting at block\n"
 664         "     `blk#' from memory address `addr'"
 665 );
 666
 667 U_BOOT_CMD(
 668         scsiboot, 3, 1, do_scsiboot,
 669         "boot from SCSI device",
 670         "loadAddr dev:part"
 671 );