git.sur5r.net Git - u-boot/blob - common/scsi.c

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <inttypes.h>
  11 #include <pci.h>
  12 #include <scsi.h>
  13 #include <dm/device-internal.h>
  14 #include <dm/uclass-internal.h>
  15
  16 #if !defined(CONFIG_DM_SCSI)
  17 #ifdef CONFIG_SCSI_DEV_LIST
  18 #define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
  19 #else
  20 #ifdef CONFIG_SATA_ULI5288
  21
  22 #define SCSI_VEND_ID 0x10b9
  23 #define SCSI_DEV_ID  0x5288
  24
  25 #elif !defined(CONFIG_SCSI_AHCI_PLAT)
  26 #error no scsi device defined
  27 #endif
  28 #define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
  29 #endif
  30 #endif
  31
  32 #if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT)
  33 const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
  34 #endif
  35 static ccb tempccb;     /* temporary scsi command buffer */
  36
  37 static unsigned char tempbuff[512]; /* temporary data buffer */
  38
  39 #if !defined(CONFIG_DM_SCSI)
  40 static int scsi_max_devs; /* number of highest available scsi device */
  41
  42 static int scsi_curr_dev; /* current device */
  43
  44 static struct blk_desc scsi_dev_desc[CONFIG_SYS_SCSI_MAX_DEVICE];
  45 #endif
  46
  47 /* almost the maximum amount of the scsi_ext command.. */
  48 #define SCSI_MAX_READ_BLK 0xFFFF
  49 #define SCSI_LBA48_READ 0xFFFFFFF
  50
  51 static void scsi_print_error(ccb *pccb)
  52 {
  53         /* Dummy function that could print an error for debugging */
  54 }
  55
  56 #ifdef CONFIG_SYS_64BIT_LBA
  57 void scsi_setup_read16(ccb *pccb, lbaint_t start, unsigned long blocks)
  58 {
  59         pccb->cmd[0] = SCSI_READ16;
  60         pccb->cmd[1] = pccb->lun << 5;
  61         pccb->cmd[2] = (unsigned char)(start >> 56) & 0xff;
  62         pccb->cmd[3] = (unsigned char)(start >> 48) & 0xff;
  63         pccb->cmd[4] = (unsigned char)(start >> 40) & 0xff;
  64         pccb->cmd[5] = (unsigned char)(start >> 32) & 0xff;
  65         pccb->cmd[6] = (unsigned char)(start >> 24) & 0xff;
  66         pccb->cmd[7] = (unsigned char)(start >> 16) & 0xff;
  67         pccb->cmd[8] = (unsigned char)(start >> 8) & 0xff;
  68         pccb->cmd[9] = (unsigned char)start & 0xff;
  69         pccb->cmd[10] = 0;
  70         pccb->cmd[11] = (unsigned char)(blocks >> 24) & 0xff;
  71         pccb->cmd[12] = (unsigned char)(blocks >> 16) & 0xff;
  72         pccb->cmd[13] = (unsigned char)(blocks >> 8) & 0xff;
  73         pccb->cmd[14] = (unsigned char)blocks & 0xff;
  74         pccb->cmd[15] = 0;
  75         pccb->cmdlen = 16;
  76         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
  77         debug("scsi_setup_read16: cmd: %02X %02X startblk %02X%02X%02X%02X%02X%02X%02X%02X blccnt %02X%02X%02X%02X\n",
  78               pccb->cmd[0], pccb->cmd[1],
  79               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
  80               pccb->cmd[6], pccb->cmd[7], pccb->cmd[8], pccb->cmd[9],
  81               pccb->cmd[11], pccb->cmd[12], pccb->cmd[13], pccb->cmd[14]);
  82 }
  83 #endif
  84
  85 static void scsi_setup_read_ext(ccb *pccb, lbaint_t start,
  86                                 unsigned short blocks)
  87 {
  88         pccb->cmd[0] = SCSI_READ10;
  89         pccb->cmd[1] = pccb->lun << 5;
  90         pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
  91         pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
  92         pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
  93         pccb->cmd[5] = (unsigned char)start & 0xff;
  94         pccb->cmd[6] = 0;
  95         pccb->cmd[7] = (unsigned char)(blocks >> 8) & 0xff;
  96         pccb->cmd[8] = (unsigned char)blocks & 0xff;
  97         pccb->cmd[6] = 0;
  98         pccb->cmdlen = 10;
  99         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 100         debug("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 101               pccb->cmd[0], pccb->cmd[1],
 102               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
 103               pccb->cmd[7], pccb->cmd[8]);
 104 }
 105
 106 static void scsi_setup_write_ext(ccb *pccb, lbaint_t start,
 107                                  unsigned short blocks)
 108 {
 109         pccb->cmd[0] = SCSI_WRITE10;
 110         pccb->cmd[1] = pccb->lun << 5;
 111         pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
 112         pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
 113         pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
 114         pccb->cmd[5] = (unsigned char)start & 0xff;
 115         pccb->cmd[6] = 0;
 116         pccb->cmd[7] = ((unsigned char)(blocks >> 8)) & 0xff;
 117         pccb->cmd[8] = (unsigned char)blocks & 0xff;
 118         pccb->cmd[9] = 0;
 119         pccb->cmdlen = 10;
 120         pccb->msgout[0] = SCSI_IDENTIFY;  /* NOT USED */
 121         debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 122               __func__,
 123               pccb->cmd[0], pccb->cmd[1],
 124               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
 125               pccb->cmd[7], pccb->cmd[8]);
 126 }
 127
 128 static void scsi_setup_inquiry(ccb *pccb)
 129 {
 130         pccb->cmd[0] = SCSI_INQUIRY;
 131         pccb->cmd[1] = pccb->lun << 5;
 132         pccb->cmd[2] = 0;
 133         pccb->cmd[3] = 0;
 134         if (pccb->datalen > 255)
 135                 pccb->cmd[4] = 255;
 136         else
 137                 pccb->cmd[4] = (unsigned char)pccb->datalen;
 138         pccb->cmd[5] = 0;
 139         pccb->cmdlen = 6;
 140         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 141 }
 142
 143 #ifdef CONFIG_BLK
 144 static ulong scsi_read(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
 145                        void *buffer)
 146 #else
 147 static ulong scsi_read(struct blk_desc *block_dev, lbaint_t blknr,
 148                        lbaint_t blkcnt, void *buffer)
 149 #endif
 150 {
 151 #ifdef CONFIG_BLK
 152         struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
 153 #endif
 154         lbaint_t start, blks;
 155         uintptr_t buf_addr;
 156         unsigned short smallblks = 0;
 157         ccb *pccb = (ccb *)&tempccb;
 158
 159         /* Setup device */
 160         pccb->target = block_dev->target;
 161         pccb->lun = block_dev->lun;
 162         buf_addr = (unsigned long)buffer;
 163         start = blknr;
 164         blks = blkcnt;
 165         debug("\nscsi_read: dev %d startblk " LBAF
 166               ", blccnt " LBAF " buffer %lx\n",
 167               block_dev->devnum, start, blks, (unsigned long)buffer);
 168         do {
 169                 pccb->pdata = (unsigned char *)buf_addr;
 170 #ifdef CONFIG_SYS_64BIT_LBA
 171                 if (start > SCSI_LBA48_READ) {
 172                         unsigned long blocks;
 173                         blocks = min_t(lbaint_t, blks, SCSI_MAX_READ_BLK);
 174                         pccb->datalen = block_dev->blksz * blocks;
 175                         scsi_setup_read16(pccb, start, blocks);
 176                         start += blocks;
 177                         blks -= blocks;
 178                 } else
 179 #endif
 180                 if (blks > SCSI_MAX_READ_BLK) {
 181                         pccb->datalen = block_dev->blksz *
 182                                 SCSI_MAX_READ_BLK;
 183                         smallblks = SCSI_MAX_READ_BLK;
 184                         scsi_setup_read_ext(pccb, start, smallblks);
 185                         start += SCSI_MAX_READ_BLK;
 186                         blks -= SCSI_MAX_READ_BLK;
 187                 } else {
 188                         pccb->datalen = block_dev->blksz * blks;
 189                         smallblks = (unsigned short)blks;
 190                         scsi_setup_read_ext(pccb, start, smallblks);
 191                         start += blks;
 192                         blks = 0;
 193                 }
 194                 debug("scsi_read_ext: startblk " LBAF
 195                       ", blccnt %x buffer %" PRIXPTR "\n",
 196                       start, smallblks, buf_addr);
 197                 if (scsi_exec(pccb) != true) {
 198                         scsi_print_error(pccb);
 199                         blkcnt -= blks;
 200                         break;
 201                 }
 202                 buf_addr += pccb->datalen;
 203         } while (blks != 0);
 204         debug("scsi_read_ext: end startblk " LBAF
 205               ", blccnt %x buffer %" PRIXPTR "\n", start, smallblks, buf_addr);
 206         return blkcnt;
 207 }
 208
 209 /*******************************************************************************
 210  * scsi_write
 211  */
 212
 213 /* Almost the maximum amount of the scsi_ext command.. */
 214 #define SCSI_MAX_WRITE_BLK 0xFFFF
 215
 216 #ifdef CONFIG_BLK
 217 static ulong scsi_write(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
 218                         const void *buffer)
 219 #else
 220 static ulong scsi_write(struct blk_desc *block_dev, lbaint_t blknr,
 221                         lbaint_t blkcnt, const void *buffer)
 222 #endif
 223 {
 224 #ifdef CONFIG_BLK
 225         struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
 226 #endif
 227         lbaint_t start, blks;
 228         uintptr_t buf_addr;
 229         unsigned short smallblks;
 230         ccb *pccb = (ccb *)&tempccb;
 231
 232         /* Setup device */
 233         pccb->target = block_dev->target;
 234         pccb->lun = block_dev->lun;
 235         buf_addr = (unsigned long)buffer;
 236         start = blknr;
 237         blks = blkcnt;
 238         debug("\n%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n",
 239               __func__, block_dev->devnum, start, blks, (unsigned long)buffer);
 240         do {
 241                 pccb->pdata = (unsigned char *)buf_addr;
 242                 if (blks > SCSI_MAX_WRITE_BLK) {
 243                         pccb->datalen = (block_dev->blksz *
 244                                          SCSI_MAX_WRITE_BLK);
 245                         smallblks = SCSI_MAX_WRITE_BLK;
 246                         scsi_setup_write_ext(pccb, start, smallblks);
 247                         start += SCSI_MAX_WRITE_BLK;
 248                         blks -= SCSI_MAX_WRITE_BLK;
 249                 } else {
 250                         pccb->datalen = block_dev->blksz * blks;
 251                         smallblks = (unsigned short)blks;
 252                         scsi_setup_write_ext(pccb, start, smallblks);
 253                         start += blks;
 254                         blks = 0;
 255                 }
 256                 debug("%s: startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
 257                       __func__, start, smallblks, buf_addr);
 258                 if (scsi_exec(pccb) != true) {
 259                         scsi_print_error(pccb);
 260                         blkcnt -= blks;
 261                         break;
 262                 }
 263                 buf_addr += pccb->datalen;
 264         } while (blks != 0);
 265         debug("%s: end startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
 266               __func__, start, smallblks, buf_addr);
 267         return blkcnt;
 268 }
 269
 270 #if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT)
 271 void scsi_init(void)
 272 {
 273         int busdevfunc = -1;
 274         int i;
 275         /*
 276          * Find a device from the list, this driver will support a single
 277          * controller.
 278          */
 279         for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
 280                 /* get PCI Device ID */
 281 #ifdef CONFIG_DM_PCI
 282                 struct udevice *dev;
 283                 int ret;
 284
 285                 ret = dm_pci_find_device(scsi_device_list[i].vendor,
 286                                          scsi_device_list[i].device, 0, &dev);
 287                 if (!ret) {
 288                         busdevfunc = dm_pci_get_bdf(dev);
 289                         break;
 290                 }
 291 #else
 292                 busdevfunc = pci_find_device(scsi_device_list[i].vendor,
 293                                              scsi_device_list[i].device,
 294                                              0);
 295 #endif
 296                 if (busdevfunc != -1)
 297                         break;
 298         }
 299
 300         if (busdevfunc == -1) {
 301                 printf("Error: SCSI Controller(s) ");
 302                 for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
 303                         printf("%04X:%04X ",
 304                                scsi_device_list[i].vendor,
 305                                scsi_device_list[i].device);
 306                 }
 307                 printf("not found\n");
 308                 return;
 309         }
 310 #ifdef DEBUG
 311         else {
 312                 printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",
 313                        scsi_device_list[i].vendor,
 314                        scsi_device_list[i].device,
 315                        (busdevfunc >> 16) & 0xFF,
 316                        (busdevfunc >> 11) & 0x1F,
 317                        (busdevfunc >> 8) & 0x7);
 318         }
 319 #endif
 320         bootstage_start(BOOTSTAGE_ID_ACCUM_SCSI, "ahci");
 321         scsi_low_level_init(busdevfunc);
 322         scsi_scan(1);
 323         bootstage_accum(BOOTSTAGE_ID_ACCUM_SCSI);
 324 }
 325 #endif
 326
 327 /* copy src to dest, skipping leading and trailing blanks
 328  * and null terminate the string
 329  */
 330 static void scsi_ident_cpy(unsigned char *dest, unsigned char *src,
 331                            unsigned int len)
 332 {
 333         int start, end;
 334
 335         start = 0;
 336         while (start < len) {
 337                 if (src[start] != ' ')
 338                         break;
 339                 start++;
 340         }
 341         end = len-1;
 342         while (end > start) {
 343                 if (src[end] != ' ')
 344                         break;
 345                 end--;
 346         }
 347         for (; start <= end; start++)
 348                 *dest ++= src[start];
 349         *dest = '\0';
 350 }
 351
 352 static int scsi_read_capacity(ccb *pccb, lbaint_t *capacity,
 353                               unsigned long *blksz)
 354 {
 355         *capacity = 0;
 356
 357         memset(pccb->cmd, '\0', sizeof(pccb->cmd));
 358         pccb->cmd[0] = SCSI_RD_CAPAC10;
 359         pccb->cmd[1] = pccb->lun << 5;
 360         pccb->cmdlen = 10;
 361         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 362
 363         pccb->datalen = 8;
 364         if (scsi_exec(pccb) != true)
 365                 return 1;
 366
 367         *capacity = ((lbaint_t)pccb->pdata[0] << 24) |
 368                     ((lbaint_t)pccb->pdata[1] << 16) |
 369                     ((lbaint_t)pccb->pdata[2] << 8)  |
 370                     ((lbaint_t)pccb->pdata[3]);
 371
 372         if (*capacity != 0xffffffff) {
 373                 /* Read capacity (10) was sufficient for this drive. */
 374                 *blksz = ((unsigned long)pccb->pdata[4] << 24) |
 375                          ((unsigned long)pccb->pdata[5] << 16) |
 376                          ((unsigned long)pccb->pdata[6] << 8)  |
 377                          ((unsigned long)pccb->pdata[7]);
 378                 return 0;
 379         }
 380
 381         /* Read capacity (10) was insufficient. Use read capacity (16). */
 382         memset(pccb->cmd, '\0', sizeof(pccb->cmd));
 383         pccb->cmd[0] = SCSI_RD_CAPAC16;
 384         pccb->cmd[1] = 0x10;
 385         pccb->cmdlen = 16;
 386         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 387
 388         pccb->datalen = 16;
 389         if (scsi_exec(pccb) != true)
 390                 return 1;
 391
 392         *capacity = ((uint64_t)pccb->pdata[0] << 56) |
 393                     ((uint64_t)pccb->pdata[1] << 48) |
 394                     ((uint64_t)pccb->pdata[2] << 40) |
 395                     ((uint64_t)pccb->pdata[3] << 32) |
 396                     ((uint64_t)pccb->pdata[4] << 24) |
 397                     ((uint64_t)pccb->pdata[5] << 16) |
 398                     ((uint64_t)pccb->pdata[6] << 8)  |
 399                     ((uint64_t)pccb->pdata[7]);
 400
 401         *blksz = ((uint64_t)pccb->pdata[8]  << 56) |
 402                  ((uint64_t)pccb->pdata[9]  << 48) |
 403                  ((uint64_t)pccb->pdata[10] << 40) |
 404                  ((uint64_t)pccb->pdata[11] << 32) |
 405                  ((uint64_t)pccb->pdata[12] << 24) |
 406                  ((uint64_t)pccb->pdata[13] << 16) |
 407                  ((uint64_t)pccb->pdata[14] << 8)  |
 408                  ((uint64_t)pccb->pdata[15]);
 409
 410         return 0;
 411 }
 412
 413
 414 /*
 415  * Some setup (fill-in) routines
 416  */
 417 static void scsi_setup_test_unit_ready(ccb *pccb)
 418 {
 419         pccb->cmd[0] = SCSI_TST_U_RDY;
 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->cmdlen = 6;
 426         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 427 }
 428
 429 /**
 430  * scsi_init_dev_desc_priv - initialize only SCSI specific blk_desc properties
 431  *
 432  * @dev_desc: Block device description pointer
 433  */
 434 static void scsi_init_dev_desc_priv(struct blk_desc *dev_desc)
 435 {
 436         dev_desc->target = 0xff;
 437         dev_desc->lun = 0xff;
 438         dev_desc->log2blksz =
 439                 LOG2_INVALID(typeof(dev_desc->log2blksz));
 440         dev_desc->type = DEV_TYPE_UNKNOWN;
 441         dev_desc->vendor[0] = 0;
 442         dev_desc->product[0] = 0;
 443         dev_desc->revision[0] = 0;
 444         dev_desc->removable = false;
 445 #ifndef CONFIG_BLK
 446         dev_desc->block_read = scsi_read;
 447         dev_desc->block_write = scsi_write;
 448 #endif
 449 }
 450
 451 #if !defined(CONFIG_DM_SCSI)
 452 /**
 453  * scsi_init_dev_desc - initialize all SCSI specific blk_desc properties
 454  *
 455  * @dev_desc: Block device description pointer
 456  * @devnum: Device number
 457  */
 458 static void scsi_init_dev_desc(struct blk_desc *dev_desc, int devnum)
 459 {
 460         dev_desc->lba = 0;
 461         dev_desc->blksz = 0;
 462         dev_desc->if_type = IF_TYPE_SCSI;
 463         dev_desc->devnum = devnum;
 464         dev_desc->part_type = PART_TYPE_UNKNOWN;
 465
 466         scsi_init_dev_desc_priv(dev_desc);
 467 }
 468 #endif
 469
 470 /**
 471  * scsi_detect_dev - Detect scsi device
 472  *
 473  * @target: target id
 474  * @lun: target lun
 475  * @dev_desc: block device description
 476  *
 477  * The scsi_detect_dev detects and fills a dev_desc structure when the device is
 478  * detected.
 479  *
 480  * Return: 0 on success, error value otherwise
 481  */
 482 static int scsi_detect_dev(int target, int lun, struct blk_desc *dev_desc)
 483 {
 484         unsigned char perq, modi;
 485         lbaint_t capacity;
 486         unsigned long blksz;
 487         ccb *pccb = (ccb *)&tempccb;
 488
 489         pccb->target = target;
 490         pccb->lun = lun;
 491         pccb->pdata = (unsigned char *)&tempbuff;
 492         pccb->datalen = 512;
 493         scsi_setup_inquiry(pccb);
 494         if (scsi_exec(pccb) != true) {
 495                 if (pccb->contr_stat == SCSI_SEL_TIME_OUT) {
 496                         /*
 497                           * selection timeout => assuming no
 498                           * device present
 499                           */
 500                         debug("Selection timeout ID %d\n",
 501                               pccb->target);
 502                         return -ETIMEDOUT;
 503                 }
 504                 scsi_print_error(pccb);
 505                 return -ENODEV;
 506         }
 507         perq = tempbuff[0];
 508         modi = tempbuff[1];
 509         if ((perq & 0x1f) == 0x1f)
 510                 return -ENODEV; /* skip unknown devices */
 511         if ((modi & 0x80) == 0x80) /* drive is removable */
 512                 dev_desc->removable = true;
 513         /* get info for this device */
 514         scsi_ident_cpy((unsigned char *)dev_desc->vendor,
 515                        &tempbuff[8], 8);
 516         scsi_ident_cpy((unsigned char *)dev_desc->product,
 517                        &tempbuff[16], 16);
 518         scsi_ident_cpy((unsigned char *)dev_desc->revision,
 519                        &tempbuff[32], 4);
 520         dev_desc->target = pccb->target;
 521         dev_desc->lun = pccb->lun;
 522
 523         pccb->datalen = 0;
 524         scsi_setup_test_unit_ready(pccb);
 525         if (scsi_exec(pccb) != true) {
 526                 if (dev_desc->removable) {
 527                         dev_desc->type = perq;
 528                         goto removable;
 529                 }
 530                 scsi_print_error(pccb);
 531                 return -EINVAL;
 532         }
 533         if (scsi_read_capacity(pccb, &capacity, &blksz)) {
 534                 scsi_print_error(pccb);
 535                 return -EINVAL;
 536         }
 537         dev_desc->lba = capacity;
 538         dev_desc->blksz = blksz;
 539         dev_desc->log2blksz = LOG2(dev_desc->blksz);
 540         dev_desc->type = perq;
 541 removable:
 542         return 0;
 543 }
 544
 545 /*
 546  * (re)-scan the scsi bus and reports scsi device info
 547  * to the user if mode = 1
 548  */
 549 #if defined(CONFIG_DM_SCSI)
 550 static int do_scsi_scan_one(struct udevice *dev, int id, int lun, int mode)
 551 {
 552         int ret;
 553         struct udevice *bdev;
 554         struct blk_desc bd;
 555         struct blk_desc *bdesc;
 556         char str[10];
 557
 558         /*
 559          * detect the scsi driver to get information about its geometry (block
 560          * size, number of blocks) and other parameters (ids, type, ...)
 561          */
 562         scsi_init_dev_desc_priv(&bd);
 563         if (scsi_detect_dev(id, lun, &bd))
 564                 return -ENODEV;
 565
 566         /*
 567         * Create only one block device and do detection
 568         * to make sure that there won't be a lot of
 569         * block devices created
 570         */
 571         snprintf(str, sizeof(str), "id%dlun%d", id, lun);
 572         ret = blk_create_devicef(dev, "scsi_blk", str, IF_TYPE_SCSI, -1,
 573                         bd.blksz, bd.blksz * bd.lba, &bdev);
 574         if (ret) {
 575                 debug("Can't create device\n");
 576                 return ret;
 577         }
 578
 579         bdesc = dev_get_uclass_platdata(bdev);
 580         bdesc->target = id;
 581         bdesc->lun = lun;
 582         bdesc->removable = bd.removable;
 583         bdesc->type = bd.type;
 584         memcpy(&bdesc->vendor, &bd.vendor, sizeof(bd.vendor));
 585         memcpy(&bdesc->product, &bd.product, sizeof(bd.product));
 586         memcpy(&bdesc->revision, &bd.revision,  sizeof(bd.revision));
 587         part_init(bdesc);
 588
 589         if (mode == 1) {
 590                 printf("  Device %d: ", 0);
 591                 dev_print(bdesc);
 592         }
 593         return 0;
 594 }
 595
 596 int scsi_scan(int mode)
 597 {
 598         unsigned char i, lun;
 599         struct uclass *uc;
 600         struct udevice *dev; /* SCSI controller */
 601         int ret;
 602
 603         if (mode == 1)
 604                 printf("scanning bus for devices...\n");
 605
 606         blk_unbind_all(IF_TYPE_SCSI);
 607
 608         ret = uclass_get(UCLASS_SCSI, &uc);
 609         if (ret)
 610                 return ret;
 611
 612         uclass_foreach_dev(dev, uc) {
 613                 struct scsi_platdata *plat; /* scsi controller platdata */
 614
 615                 /* probe SCSI controller driver */
 616                 ret = device_probe(dev);
 617                 if (ret)
 618                         return ret;
 619
 620                 /* Get controller platdata */
 621                 plat = dev_get_platdata(dev);
 622
 623                 for (i = 0; i < plat->max_id; i++)
 624                         for (lun = 0; lun < plat->max_lun; lun++)
 625                                 do_scsi_scan_one(dev, i, lun, mode);
 626         }
 627
 628         return 0;
 629 }
 630 #else
 631 int scsi_scan(int mode)
 632 {
 633         unsigned char i, lun;
 634         int ret;
 635
 636         if (mode == 1)
 637                 printf("scanning bus for devices...\n");
 638         for (i = 0; i < CONFIG_SYS_SCSI_MAX_DEVICE; i++)
 639                 scsi_init_dev_desc(&scsi_dev_desc[i], i);
 640
 641         scsi_max_devs = 0;
 642         for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) {
 643                 for (lun = 0; lun < CONFIG_SYS_SCSI_MAX_LUN; lun++) {
 644                         ret = scsi_detect_dev(i, lun,
 645                                               &scsi_dev_desc[scsi_max_devs]);
 646                         if (ret)
 647                                 continue;
 648                         part_init(&scsi_dev_desc[scsi_max_devs]);
 649
 650                         if (mode == 1) {
 651                                 printf("  Device %d: ", 0);
 652                                 dev_print(&scsi_dev_desc[scsi_max_devs]);
 653                         } /* if mode */
 654                         scsi_max_devs++;
 655                 } /* next LUN */
 656         }
 657         if (scsi_max_devs > 0)
 658                 scsi_curr_dev = 0;
 659         else
 660                 scsi_curr_dev = -1;
 661
 662         printf("Found %d device(s).\n", scsi_max_devs);
 663 #ifndef CONFIG_SPL_BUILD
 664         setenv_ulong("scsidevs", scsi_max_devs);
 665 #endif
 666         return 0;
 667 }
 668 #endif
 669
 670 #ifdef CONFIG_BLK
 671 static const struct blk_ops scsi_blk_ops = {
 672         .read   = scsi_read,
 673         .write  = scsi_write,
 674 };
 675
 676 U_BOOT_DRIVER(scsi_blk) = {
 677         .name           = "scsi_blk",
 678         .id             = UCLASS_BLK,
 679         .ops            = &scsi_blk_ops,
 680 };
 681 #else
 682 U_BOOT_LEGACY_BLK(scsi) = {
 683         .if_typename    = "scsi",
 684         .if_type        = IF_TYPE_SCSI,
 685         .max_devs       = CONFIG_SYS_SCSI_MAX_DEVICE,
 686         .desc           = scsi_dev_desc,
 687 };
 688 #endif