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