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         return common_diskboot(cmdtp, "scsi", argc, argv);
 210 }
 211
 212 /*********************************************************************************
 213  * scsi command intepreter
 214  */
 215 int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 216 {
 217         switch (argc) {
 218         case 0:
 219         case 1:
 220                 return CMD_RET_USAGE;
 221
 222         case 2:
 223                         if (strncmp(argv[1],"res",3) == 0) {
 224                                 printf("\nReset SCSI\n");
 225                                 scsi_bus_reset();
 226                                 scsi_scan(1);
 227                                 return 0;
 228                         }
 229                         if (strncmp(argv[1],"inf",3) == 0) {
 230                                 int i;
 231                                 for (i=0; i<CONFIG_SYS_SCSI_MAX_DEVICE; ++i) {
 232                                         if(scsi_dev_desc[i].type==DEV_TYPE_UNKNOWN)
 233                                                 continue; /* list only known devices */
 234                                         printf ("SCSI dev. %d:  ", i);
 235                                         dev_print(&scsi_dev_desc[i]);
 236                                 }
 237                                 return 0;
 238                         }
 239                         if (strncmp(argv[1],"dev",3) == 0) {
 240                                 if ((scsi_curr_dev < 0) || (scsi_curr_dev >= CONFIG_SYS_SCSI_MAX_DEVICE)) {
 241                                         printf("\nno SCSI devices available\n");
 242                                         return 1;
 243                                 }
 244                                 printf ("\n    Device %d: ", scsi_curr_dev);
 245                                 dev_print(&scsi_dev_desc[scsi_curr_dev]);
 246                                 return 0;
 247                         }
 248                         if (strncmp(argv[1],"scan",4) == 0) {
 249                                 scsi_scan(1);
 250                                 return 0;
 251                         }
 252                         if (strncmp(argv[1],"part",4) == 0) {
 253                                 int dev, ok;
 254                                 for (ok=0, dev=0; dev<CONFIG_SYS_SCSI_MAX_DEVICE; ++dev) {
 255                                         if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
 256                                                 ok++;
 257                                                 if (dev)
 258                                                         printf("\n");
 259                                                 debug ("print_part of %x\n",dev);
 260                                                         print_part(&scsi_dev_desc[dev]);
 261                                         }
 262                                 }
 263                                 if (!ok)
 264                                         printf("\nno SCSI devices available\n");
 265                                 return 1;
 266                         }
 267                         return CMD_RET_USAGE;
 268         case 3:
 269                         if (strncmp(argv[1],"dev",3) == 0) {
 270                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 271                                 printf ("\nSCSI device %d: ", dev);
 272                                 if (dev >= CONFIG_SYS_SCSI_MAX_DEVICE) {
 273                                         printf("unknown device\n");
 274                                         return 1;
 275                                 }
 276                                 printf ("\n    Device %d: ", dev);
 277                                 dev_print(&scsi_dev_desc[dev]);
 278                                 if(scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
 279                                         return 1;
 280                                 }
 281                                 scsi_curr_dev = dev;
 282                                 printf("... is now current device\n");
 283                                 return 0;
 284                         }
 285                         if (strncmp(argv[1],"part",4) == 0) {
 286                                 int dev = (int)simple_strtoul(argv[2], NULL, 10);
 287                                 if(scsi_dev_desc[dev].type != DEV_TYPE_UNKNOWN) {
 288                                         print_part(&scsi_dev_desc[dev]);
 289                                 }
 290                                 else {
 291                                         printf ("\nSCSI device %d not available\n", dev);
 292                                 }
 293                                 return 1;
 294                         }
 295                         return CMD_RET_USAGE;
 296     default:
 297                         /* at least 4 args */
 298                         if (strcmp(argv[1],"read") == 0) {
 299                                 ulong addr = simple_strtoul(argv[2], NULL, 16);
 300                                 ulong blk  = simple_strtoul(argv[3], NULL, 16);
 301                                 ulong cnt  = simple_strtoul(argv[4], NULL, 16);
 302                                 ulong n;
 303                                 printf ("\nSCSI read: device %d block # %ld, count %ld ... ",
 304                                                 scsi_curr_dev, blk, cnt);
 305                                 n = scsi_read(scsi_curr_dev, blk, cnt, (ulong *)addr);
 306                                 printf ("%ld blocks read: %s\n",n,(n==cnt) ? "OK" : "ERROR");
 307                                 return 0;
 308                         }
 309         } /* switch */
 310         return CMD_RET_USAGE;
 311 }
 312
 313 /****************************************************************************************
 314  * scsi_read
 315  */
 316
 317 #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
 318
 319 ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer)
 320 {
 321         ulong start,blks, buf_addr;
 322         unsigned short smallblks;
 323         ccb* pccb=(ccb *)&tempccb;
 324         device&=0xff;
 325         /* Setup  device
 326          */
 327         pccb->target=scsi_dev_desc[device].target;
 328         pccb->lun=scsi_dev_desc[device].lun;
 329         buf_addr=(unsigned long)buffer;
 330         start=blknr;
 331         blks=blkcnt;
 332         debug ("\nscsi_read: dev %d startblk %lx, blccnt %lx buffer %lx\n",device,start,blks,(unsigned long)buffer);
 333         do {
 334                 pccb->pdata=(unsigned char *)buf_addr;
 335                 if(blks>SCSI_MAX_READ_BLK) {
 336                         pccb->datalen=scsi_dev_desc[device].blksz * SCSI_MAX_READ_BLK;
 337                         smallblks=SCSI_MAX_READ_BLK;
 338                         scsi_setup_read_ext(pccb,start,smallblks);
 339                         start+=SCSI_MAX_READ_BLK;
 340                         blks-=SCSI_MAX_READ_BLK;
 341                 }
 342                 else {
 343                         pccb->datalen=scsi_dev_desc[device].blksz * blks;
 344                         smallblks=(unsigned short) blks;
 345                         scsi_setup_read_ext(pccb,start,smallblks);
 346                         start+=blks;
 347                         blks=0;
 348                 }
 349                 debug ("scsi_read_ext: startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
 350                 if(scsi_exec(pccb)!=TRUE) {
 351                         scsi_print_error(pccb);
 352                         blkcnt-=blks;
 353                         break;
 354                 }
 355                 buf_addr+=pccb->datalen;
 356         } while(blks!=0);
 357         debug ("scsi_read_ext: end startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
 358         return(blkcnt);
 359 }
 360
 361 /* copy src to dest, skipping leading and trailing blanks
 362  * and null terminate the string
 363  */
 364 void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len)
 365 {
 366         int start,end;
 367
 368         start=0;
 369         while(start<len) {
 370                 if(src[start]!=' ')
 371                         break;
 372                 start++;
 373         }
 374         end=len-1;
 375         while(end>start) {
 376                 if(src[end]!=' ')
 377                         break;
 378                 end--;
 379         }
 380         for( ; start<=end; start++) {
 381                 *dest++=src[start];
 382         }
 383         *dest='\0';
 384 }
 385
 386
 387 /* Trim trailing blanks, and NUL-terminate string
 388  */
 389 void scsi_trim_trail (unsigned char *str, unsigned int len)
 390 {
 391         unsigned char *p = str + len - 1;
 392
 393         while (len-- > 0) {
 394                 *p-- = '\0';
 395                 if (*p != ' ') {
 396                         return;
 397                 }
 398         }
 399 }
 400
 401
 402 /************************************************************************************
 403  * Some setup (fill-in) routines
 404  */
 405 void scsi_setup_test_unit_ready(ccb * pccb)
 406 {
 407         pccb->cmd[0]=SCSI_TST_U_RDY;
 408         pccb->cmd[1]=pccb->lun<<5;
 409         pccb->cmd[2]=0;
 410         pccb->cmd[3]=0;
 411         pccb->cmd[4]=0;
 412         pccb->cmd[5]=0;
 413         pccb->cmdlen=6;
 414         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 415 }
 416
 417 void scsi_setup_read_capacity(ccb * pccb)
 418 {
 419         pccb->cmd[0]=SCSI_RD_CAPAC;
 420         pccb->cmd[1]=pccb->lun<<5;
 421         pccb->cmd[2]=0;
 422         pccb->cmd[3]=0;
 423         pccb->cmd[4]=0;
 424         pccb->cmd[5]=0;
 425         pccb->cmd[6]=0;
 426         pccb->cmd[7]=0;
 427         pccb->cmd[8]=0;
 428         pccb->cmd[9]=0;
 429         pccb->cmdlen=10;
 430         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 431
 432 }
 433
 434 void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks)
 435 {
 436         pccb->cmd[0]=SCSI_READ10;
 437         pccb->cmd[1]=pccb->lun<<5;
 438         pccb->cmd[2]=((unsigned char) (start>>24))&0xff;
 439         pccb->cmd[3]=((unsigned char) (start>>16))&0xff;
 440         pccb->cmd[4]=((unsigned char) (start>>8))&0xff;
 441         pccb->cmd[5]=((unsigned char) (start))&0xff;
 442         pccb->cmd[6]=0;
 443         pccb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
 444         pccb->cmd[8]=(unsigned char) blocks & 0xff;
 445         pccb->cmd[6]=0;
 446         pccb->cmdlen=10;
 447         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 448         debug ("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 449                 pccb->cmd[0],pccb->cmd[1],
 450                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4],pccb->cmd[5],
 451                 pccb->cmd[7],pccb->cmd[8]);
 452 }
 453
 454 void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks)
 455 {
 456         pccb->cmd[0]=SCSI_READ6;
 457         pccb->cmd[1]=pccb->lun<<5 | (((unsigned char)(start>>16))&0x1f);
 458         pccb->cmd[2]=((unsigned char) (start>>8))&0xff;
 459         pccb->cmd[3]=((unsigned char) (start))&0xff;
 460         pccb->cmd[4]=(unsigned char) blocks & 0xff;
 461         pccb->cmd[5]=0;
 462         pccb->cmdlen=6;
 463         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 464         debug ("scsi_setup_read6: cmd: %02X %02X startblk %02X%02X blccnt %02X\n",
 465                 pccb->cmd[0],pccb->cmd[1],
 466                 pccb->cmd[2],pccb->cmd[3],pccb->cmd[4]);
 467 }
 468
 469
 470 void scsi_setup_inquiry(ccb * pccb)
 471 {
 472         pccb->cmd[0]=SCSI_INQUIRY;
 473         pccb->cmd[1]=pccb->lun<<5;
 474         pccb->cmd[2]=0;
 475         pccb->cmd[3]=0;
 476         if(pccb->datalen>255)
 477                 pccb->cmd[4]=255;
 478         else
 479                 pccb->cmd[4]=(unsigned char)pccb->datalen;
 480         pccb->cmd[5]=0;
 481         pccb->cmdlen=6;
 482         pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 483 }
 484
 485
 486 U_BOOT_CMD(
 487         scsi, 5, 1, do_scsi,
 488         "SCSI sub-system",
 489         "reset - reset SCSI controller\n"
 490         "scsi info  - show available SCSI devices\n"
 491         "scsi scan  - (re-)scan SCSI bus\n"
 492         "scsi device [dev] - show or set current device\n"
 493         "scsi part [dev] - print partition table of one or all SCSI devices\n"
 494         "scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 495         "     to memory address `addr'"
 496 );
 497
 498 U_BOOT_CMD(
 499         scsiboot, 3, 1, do_scsiboot,
 500         "boot from SCSI device",
 501         "loadAddr dev:part"
 502 );