drivers/scsi/scsi.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2001
   4  * Denis Peter, MPL AG Switzerland
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <env.h>
  10 #include <pci.h>
  11 #include <scsi.h>
  12 #include <dm/device-internal.h>
  13 #include <dm/uclass-internal.h>
  14
  15 #if !defined(CONFIG_DM_SCSI)
  16 # ifdef CONFIG_SCSI_DEV_LIST
  17 #  define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
  18 # else
  19 #  ifdef CONFIG_SATA_ULI5288
  20
  21 #   define SCSI_VEND_ID 0x10b9
  22 #   define SCSI_DEV_ID  0x5288
  23
  24 #  elif !defined(CONFIG_SCSI_AHCI_PLAT)
  25 #   error no scsi device defined
  26 #  endif
  27 # define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
  28 # endif
  29 #endif
  30
  31 #if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT) && \
  32         !defined(CONFIG_DM_SCSI)
  33 const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
  34 #endif
  35 static struct scsi_cmd 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_BLK 0xFFFF
  49 #define SCSI_LBA48_READ 0xFFFFFFF
  50
  51 static void scsi_print_error(struct scsi_cmd *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(struct scsi_cmd *pccb, lbaint_t start,
  58                        unsigned long blocks)
  59 {
  60         pccb->cmd[0] = SCSI_READ16;
  61         pccb->cmd[1] = pccb->lun << 5;
  62         pccb->cmd[2] = (unsigned char)(start >> 56) & 0xff;
  63         pccb->cmd[3] = (unsigned char)(start >> 48) & 0xff;
  64         pccb->cmd[4] = (unsigned char)(start >> 40) & 0xff;
  65         pccb->cmd[5] = (unsigned char)(start >> 32) & 0xff;
  66         pccb->cmd[6] = (unsigned char)(start >> 24) & 0xff;
  67         pccb->cmd[7] = (unsigned char)(start >> 16) & 0xff;
  68         pccb->cmd[8] = (unsigned char)(start >> 8) & 0xff;
  69         pccb->cmd[9] = (unsigned char)start & 0xff;
  70         pccb->cmd[10] = 0;
  71         pccb->cmd[11] = (unsigned char)(blocks >> 24) & 0xff;
  72         pccb->cmd[12] = (unsigned char)(blocks >> 16) & 0xff;
  73         pccb->cmd[13] = (unsigned char)(blocks >> 8) & 0xff;
  74         pccb->cmd[14] = (unsigned char)blocks & 0xff;
  75         pccb->cmd[15] = 0;
  76         pccb->cmdlen = 16;
  77         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
  78         debug("scsi_setup_read16: cmd: %02X %02X startblk %02X%02X%02X%02X%02X%02X%02X%02X blccnt %02X%02X%02X%02X\n",
  79               pccb->cmd[0], pccb->cmd[1],
  80               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
  81               pccb->cmd[6], pccb->cmd[7], pccb->cmd[8], pccb->cmd[9],
  82               pccb->cmd[11], pccb->cmd[12], pccb->cmd[13], pccb->cmd[14]);
  83 }
  84 #endif
  85
  86 static void scsi_setup_inquiry(struct scsi_cmd *pccb)
  87 {
  88         pccb->cmd[0] = SCSI_INQUIRY;
  89         pccb->cmd[1] = pccb->lun << 5;
  90         pccb->cmd[2] = 0;
  91         pccb->cmd[3] = 0;
  92         if (pccb->datalen > 255)
  93                 pccb->cmd[4] = 255;
  94         else
  95                 pccb->cmd[4] = (unsigned char)pccb->datalen;
  96         pccb->cmd[5] = 0;
  97         pccb->cmdlen = 6;
  98         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
  99 }
 100
 101 #ifdef CONFIG_BLK
 102 static void scsi_setup_read_ext(struct scsi_cmd *pccb, lbaint_t start,
 103                                 unsigned short blocks)
 104 {
 105         pccb->cmd[0] = SCSI_READ10;
 106         pccb->cmd[1] = pccb->lun << 5;
 107         pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
 108         pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
 109         pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
 110         pccb->cmd[5] = (unsigned char)start & 0xff;
 111         pccb->cmd[6] = 0;
 112         pccb->cmd[7] = (unsigned char)(blocks >> 8) & 0xff;
 113         pccb->cmd[8] = (unsigned char)blocks & 0xff;
 114         pccb->cmd[6] = 0;
 115         pccb->cmdlen = 10;
 116         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 117         debug("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 118               pccb->cmd[0], pccb->cmd[1],
 119               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
 120               pccb->cmd[7], pccb->cmd[8]);
 121 }
 122
 123 static void scsi_setup_write_ext(struct scsi_cmd *pccb, lbaint_t start,
 124                                  unsigned short blocks)
 125 {
 126         pccb->cmd[0] = SCSI_WRITE10;
 127         pccb->cmd[1] = pccb->lun << 5;
 128         pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
 129         pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
 130         pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
 131         pccb->cmd[5] = (unsigned char)start & 0xff;
 132         pccb->cmd[6] = 0;
 133         pccb->cmd[7] = ((unsigned char)(blocks >> 8)) & 0xff;
 134         pccb->cmd[8] = (unsigned char)blocks & 0xff;
 135         pccb->cmd[9] = 0;
 136         pccb->cmdlen = 10;
 137         pccb->msgout[0] = SCSI_IDENTIFY;  /* NOT USED */
 138         debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 139               __func__,
 140               pccb->cmd[0], pccb->cmd[1],
 141               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
 142               pccb->cmd[7], pccb->cmd[8]);
 143 }
 144
 145 static ulong scsi_read(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
 146                        void *buffer)
 147 {
 148         struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
 149         struct udevice *bdev = dev->parent;
 150         struct scsi_platdata *uc_plat = dev_get_uclass_platdata(bdev);
 151         lbaint_t start, blks, max_blks;
 152         uintptr_t buf_addr;
 153         unsigned short smallblks = 0;
 154         struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
 155
 156         /* Setup device */
 157         pccb->target = block_dev->target;
 158         pccb->lun = block_dev->lun;
 159         buf_addr = (unsigned long)buffer;
 160         start = blknr;
 161         blks = blkcnt;
 162         if (uc_plat->max_bytes_per_req)
 163                 max_blks = uc_plat->max_bytes_per_req / block_dev->blksz;
 164         else
 165                 max_blks = SCSI_MAX_BLK;
 166
 167         debug("\nscsi_read: dev %d startblk " LBAF
 168               ", blccnt " LBAF " buffer %lx\n",
 169               block_dev->devnum, start, blks, (unsigned long)buffer);
 170         do {
 171                 pccb->pdata = (unsigned char *)buf_addr;
 172                 pccb->dma_dir = DMA_FROM_DEVICE;
 173 #ifdef CONFIG_SYS_64BIT_LBA
 174                 if (start > SCSI_LBA48_READ) {
 175                         unsigned long blocks;
 176                         blocks = min_t(lbaint_t, blks, max_blks);
 177                         pccb->datalen = block_dev->blksz * blocks;
 178                         scsi_setup_read16(pccb, start, blocks);
 179                         start += blocks;
 180                         blks -= blocks;
 181                 } else
 182 #endif
 183                 if (blks > max_blks) {
 184                         pccb->datalen = block_dev->blksz * max_blks;
 185                         smallblks = max_blks;
 186                         scsi_setup_read_ext(pccb, start, smallblks);
 187                         start += max_blks;
 188                         blks -= max_blks;
 189                 } else {
 190                         pccb->datalen = block_dev->blksz * blks;
 191                         smallblks = (unsigned short)blks;
 192                         scsi_setup_read_ext(pccb, start, smallblks);
 193                         start += blks;
 194                         blks = 0;
 195                 }
 196                 debug("scsi_read_ext: startblk " LBAF
 197                       ", blccnt %x buffer %lX\n",
 198                       start, smallblks, buf_addr);
 199                 if (scsi_exec(bdev, pccb)) {
 200                         scsi_print_error(pccb);
 201                         blkcnt -= blks;
 202                         break;
 203                 }
 204                 buf_addr += pccb->datalen;
 205         } while (blks != 0);
 206         debug("scsi_read_ext: end startblk " LBAF
 207               ", blccnt %x buffer %lX\n", start, smallblks, buf_addr);
 208         return blkcnt;
 209 }
 210
 211 /*******************************************************************************
 212  * scsi_write
 213  */
 214
 215 static ulong scsi_write(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
 216                         const void *buffer)
 217 {
 218         struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
 219         struct udevice *bdev = dev->parent;
 220         struct scsi_platdata *uc_plat = dev_get_uclass_platdata(bdev);
 221         lbaint_t start, blks, max_blks;
 222         uintptr_t buf_addr;
 223         unsigned short smallblks;
 224         struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
 225
 226         /* Setup device */
 227         pccb->target = block_dev->target;
 228         pccb->lun = block_dev->lun;
 229         buf_addr = (unsigned long)buffer;
 230         start = blknr;
 231         blks = blkcnt;
 232         if (uc_plat->max_bytes_per_req)
 233                 max_blks = uc_plat->max_bytes_per_req / block_dev->blksz;
 234         else
 235                 max_blks = SCSI_MAX_BLK;
 236
 237         debug("\n%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n",
 238               __func__, block_dev->devnum, start, blks, (unsigned long)buffer);
 239         do {
 240                 pccb->pdata = (unsigned char *)buf_addr;
 241                 pccb->dma_dir = DMA_TO_DEVICE;
 242                 if (blks > max_blks) {
 243                         pccb->datalen = block_dev->blksz * max_blks;
 244                         smallblks = max_blks;
 245                         scsi_setup_write_ext(pccb, start, smallblks);
 246                         start += max_blks;
 247                         blks -= max_blks;
 248                 } else {
 249                         pccb->datalen = block_dev->blksz * blks;
 250                         smallblks = (unsigned short)blks;
 251                         scsi_setup_write_ext(pccb, start, smallblks);
 252                         start += blks;
 253                         blks = 0;
 254                 }
 255                 debug("%s: startblk " LBAF ", blccnt %x buffer %lx\n",
 256                       __func__, start, smallblks, buf_addr);
 257                 if (scsi_exec(bdev, pccb)) {
 258                         scsi_print_error(pccb);
 259                         blkcnt -= blks;
 260                         break;
 261                 }
 262                 buf_addr += pccb->datalen;
 263         } while (blks != 0);
 264         debug("%s: end startblk " LBAF ", blccnt %x buffer %lX\n",
 265               __func__, start, smallblks, buf_addr);
 266         return blkcnt;
 267 }
 268 #endif
 269
 270 #if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT) && \
 271         !defined(CONFIG_DM_SCSI)
 272 void scsi_init(void)
 273 {
 274         int busdevfunc = -1;
 275         int i;
 276         /*
 277          * Find a device from the list, this driver will support a single
 278          * controller.
 279          */
 280         for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
 281                 /* get PCI Device ID */
 282 #ifdef CONFIG_DM_PCI
 283                 struct udevice *dev;
 284                 int ret;
 285
 286                 ret = dm_pci_find_device(scsi_device_list[i].vendor,
 287                                          scsi_device_list[i].device, 0, &dev);
 288                 if (!ret) {
 289                         busdevfunc = dm_pci_get_bdf(dev);
 290                         break;
 291                 }
 292 #else
 293                 busdevfunc = pci_find_device(scsi_device_list[i].vendor,
 294                                              scsi_device_list[i].device,
 295                                              0);
 296 #endif
 297                 if (busdevfunc != -1)
 298                         break;
 299         }
 300
 301         if (busdevfunc == -1) {
 302                 printf("Error: SCSI Controller(s) ");
 303                 for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
 304                         printf("%04X:%04X ",
 305                                scsi_device_list[i].vendor,
 306                                scsi_device_list[i].device);
 307                 }
 308                 printf("not found\n");
 309                 return;
 310         }
 311 #ifdef DEBUG
 312         else {
 313                 printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",
 314                        scsi_device_list[i].vendor,
 315                        scsi_device_list[i].device,
 316                        (busdevfunc >> 16) & 0xFF,
 317                        (busdevfunc >> 11) & 0x1F,
 318                        (busdevfunc >> 8) & 0x7);
 319         }
 320 #endif
 321         bootstage_start(BOOTSTAGE_ID_ACCUM_SCSI, "ahci");
 322         scsi_low_level_init(busdevfunc);
 323         scsi_scan(true);
 324         bootstage_accum(BOOTSTAGE_ID_ACCUM_SCSI);
 325 }
 326 #endif
 327
 328 /* copy src to dest, skipping leading and trailing blanks
 329  * and null terminate the string
 330  */
 331 static void scsi_ident_cpy(unsigned char *dest, unsigned char *src,
 332                            unsigned int len)
 333 {
 334         int start, end;
 335
 336         start = 0;
 337         while (start < len) {
 338                 if (src[start] != ' ')
 339                         break;
 340                 start++;
 341         }
 342         end = len-1;
 343         while (end > start) {
 344                 if (src[end] != ' ')
 345                         break;
 346                 end--;
 347         }
 348         for (; start <= end; start++)
 349                 *dest ++= src[start];
 350         *dest = '\0';
 351 }
 352
 353 static int scsi_read_capacity(struct udevice *dev, struct scsi_cmd *pccb,
 354                               lbaint_t *capacity, unsigned long *blksz)
 355 {
 356         *capacity = 0;
 357
 358         memset(pccb->cmd, '\0', sizeof(pccb->cmd));
 359         pccb->cmd[0] = SCSI_RD_CAPAC10;
 360         pccb->cmd[1] = pccb->lun << 5;
 361         pccb->cmdlen = 10;
 362         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 363
 364         pccb->datalen = 8;
 365         if (scsi_exec(dev, pccb))
 366                 return 1;
 367
 368         *capacity = ((lbaint_t)pccb->pdata[0] << 24) |
 369                     ((lbaint_t)pccb->pdata[1] << 16) |
 370                     ((lbaint_t)pccb->pdata[2] << 8)  |
 371                     ((lbaint_t)pccb->pdata[3]);
 372
 373         if (*capacity != 0xffffffff) {
 374                 /* Read capacity (10) was sufficient for this drive. */
 375                 *blksz = ((unsigned long)pccb->pdata[4] << 24) |
 376                          ((unsigned long)pccb->pdata[5] << 16) |
 377                          ((unsigned long)pccb->pdata[6] << 8)  |
 378                          ((unsigned long)pccb->pdata[7]);
 379                 return 0;
 380         }
 381
 382         /* Read capacity (10) was insufficient. Use read capacity (16). */
 383         memset(pccb->cmd, '\0', sizeof(pccb->cmd));
 384         pccb->cmd[0] = SCSI_RD_CAPAC16;
 385         pccb->cmd[1] = 0x10;
 386         pccb->cmdlen = 16;
 387         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 388
 389         pccb->datalen = 16;
 390         pccb->dma_dir = DMA_FROM_DEVICE;
 391         if (scsi_exec(dev, pccb))
 392                 return 1;
 393
 394         *capacity = ((uint64_t)pccb->pdata[0] << 56) |
 395                     ((uint64_t)pccb->pdata[1] << 48) |
 396                     ((uint64_t)pccb->pdata[2] << 40) |
 397                     ((uint64_t)pccb->pdata[3] << 32) |
 398                     ((uint64_t)pccb->pdata[4] << 24) |
 399                     ((uint64_t)pccb->pdata[5] << 16) |
 400                     ((uint64_t)pccb->pdata[6] << 8)  |
 401                     ((uint64_t)pccb->pdata[7]);
 402
 403         *blksz = ((uint64_t)pccb->pdata[8]  << 56) |
 404                  ((uint64_t)pccb->pdata[9]  << 48) |
 405                  ((uint64_t)pccb->pdata[10] << 40) |
 406                  ((uint64_t)pccb->pdata[11] << 32) |
 407                  ((uint64_t)pccb->pdata[12] << 24) |
 408                  ((uint64_t)pccb->pdata[13] << 16) |
 409                  ((uint64_t)pccb->pdata[14] << 8)  |
 410                  ((uint64_t)pccb->pdata[15]);
 411
 412         return 0;
 413 }
 414
 415
 416 /*
 417  * Some setup (fill-in) routines
 418  */
 419 static void scsi_setup_test_unit_ready(struct scsi_cmd *pccb)
 420 {
 421         pccb->cmd[0] = SCSI_TST_U_RDY;
 422         pccb->cmd[1] = pccb->lun << 5;
 423         pccb->cmd[2] = 0;
 424         pccb->cmd[3] = 0;
 425         pccb->cmd[4] = 0;
 426         pccb->cmd[5] = 0;
 427         pccb->cmdlen = 6;
 428         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 429 }
 430
 431 /**
 432  * scsi_init_dev_desc_priv - initialize only SCSI specific blk_desc properties
 433  *
 434  * @dev_desc: Block device description pointer
 435  */
 436 static void scsi_init_dev_desc_priv(struct blk_desc *dev_desc)
 437 {
 438         dev_desc->target = 0xff;
 439         dev_desc->lun = 0xff;
 440         dev_desc->log2blksz =
 441                 LOG2_INVALID(typeof(dev_desc->log2blksz));
 442         dev_desc->type = DEV_TYPE_UNKNOWN;
 443         dev_desc->vendor[0] = 0;
 444         dev_desc->product[0] = 0;
 445         dev_desc->revision[0] = 0;
 446         dev_desc->removable = false;
 447 }
 448
 449 #if !defined(CONFIG_DM_SCSI)
 450 /**
 451  * scsi_init_dev_desc - initialize all SCSI specific blk_desc properties
 452  *
 453  * @dev_desc: Block device description pointer
 454  * @devnum: Device number
 455  */
 456 static void scsi_init_dev_desc(struct blk_desc *dev_desc, int devnum)
 457 {
 458         dev_desc->lba = 0;
 459         dev_desc->blksz = 0;
 460         dev_desc->if_type = IF_TYPE_SCSI;
 461         dev_desc->devnum = devnum;
 462         dev_desc->part_type = PART_TYPE_UNKNOWN;
 463
 464         scsi_init_dev_desc_priv(dev_desc);
 465 }
 466 #endif
 467
 468 /**
 469  * scsi_detect_dev - Detect scsi device
 470  *
 471  * @target: target id
 472  * @lun: target lun
 473  * @dev_desc: block device description
 474  *
 475  * The scsi_detect_dev detects and fills a dev_desc structure when the device is
 476  * detected.
 477  *
 478  * Return: 0 on success, error value otherwise
 479  */
 480 static int scsi_detect_dev(struct udevice *dev, int target, int lun,
 481                            struct blk_desc *dev_desc)
 482 {
 483         unsigned char perq, modi;
 484         lbaint_t capacity;
 485         unsigned long blksz;
 486         struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
 487         int count, err;
 488
 489         pccb->target = target;
 490         pccb->lun = lun;
 491         pccb->pdata = (unsigned char *)&tempbuff;
 492         pccb->datalen = 512;
 493         pccb->dma_dir = DMA_FROM_DEVICE;
 494         scsi_setup_inquiry(pccb);
 495         if (scsi_exec(dev, pccb)) {
 496                 if (pccb->contr_stat == SCSI_SEL_TIME_OUT) {
 497                         /*
 498                           * selection timeout => assuming no
 499                           * device present
 500                           */
 501                         debug("Selection timeout ID %d\n",
 502                               pccb->target);
 503                         return -ETIMEDOUT;
 504                 }
 505                 scsi_print_error(pccb);
 506                 return -ENODEV;
 507         }
 508         perq = tempbuff[0];
 509         modi = tempbuff[1];
 510         if ((perq & 0x1f) == 0x1f)
 511                 return -ENODEV; /* skip unknown devices */
 512         if ((modi & 0x80) == 0x80) /* drive is removable */
 513                 dev_desc->removable = true;
 514         /* get info for this device */
 515         scsi_ident_cpy((unsigned char *)dev_desc->vendor,
 516                        &tempbuff[8], 8);
 517         scsi_ident_cpy((unsigned char *)dev_desc->product,
 518                        &tempbuff[16], 16);
 519         scsi_ident_cpy((unsigned char *)dev_desc->revision,
 520                        &tempbuff[32], 4);
 521         dev_desc->target = pccb->target;
 522         dev_desc->lun = pccb->lun;
 523
 524         for (count = 0; count < 3; count++) {
 525                 pccb->datalen = 0;
 526                 scsi_setup_test_unit_ready(pccb);
 527                 err = scsi_exec(dev, pccb);
 528                 if (!err)
 529                         break;
 530         }
 531         if (err) {
 532                 if (dev_desc->removable) {
 533                         dev_desc->type = perq;
 534                         goto removable;
 535                 }
 536                 scsi_print_error(pccb);
 537                 return -EINVAL;
 538         }
 539         if (scsi_read_capacity(dev, pccb, &capacity, &blksz)) {
 540                 scsi_print_error(pccb);
 541                 return -EINVAL;
 542         }
 543         dev_desc->lba = capacity;
 544         dev_desc->blksz = blksz;
 545         dev_desc->log2blksz = LOG2(dev_desc->blksz);
 546         dev_desc->type = perq;
 547 removable:
 548         return 0;
 549 }
 550
 551 /*
 552  * (re)-scan the scsi bus and reports scsi device info
 553  * to the user if mode = 1
 554  */
 555 #if defined(CONFIG_DM_SCSI)
 556 static int do_scsi_scan_one(struct udevice *dev, int id, int lun, bool verbose)
 557 {
 558         int ret;
 559         struct udevice *bdev;
 560         struct blk_desc bd;
 561         struct blk_desc *bdesc;
 562         char str[10];
 563
 564         /*
 565          * detect the scsi driver to get information about its geometry (block
 566          * size, number of blocks) and other parameters (ids, type, ...)
 567          */
 568         scsi_init_dev_desc_priv(&bd);
 569         if (scsi_detect_dev(dev, id, lun, &bd))
 570                 return -ENODEV;
 571
 572         /*
 573         * Create only one block device and do detection
 574         * to make sure that there won't be a lot of
 575         * block devices created
 576         */
 577         snprintf(str, sizeof(str), "id%dlun%d", id, lun);
 578         ret = blk_create_devicef(dev, "scsi_blk", str, IF_TYPE_SCSI, -1,
 579                         bd.blksz, bd.lba, &bdev);
 580         if (ret) {
 581                 debug("Can't create device\n");
 582                 return ret;
 583         }
 584
 585         bdesc = dev_get_uclass_platdata(bdev);
 586         bdesc->target = id;
 587         bdesc->lun = lun;
 588         bdesc->removable = bd.removable;
 589         bdesc->type = bd.type;
 590         memcpy(&bdesc->vendor, &bd.vendor, sizeof(bd.vendor));
 591         memcpy(&bdesc->product, &bd.product, sizeof(bd.product));
 592         memcpy(&bdesc->revision, &bd.revision,  sizeof(bd.revision));
 593
 594         if (verbose) {
 595                 printf("  Device %d: ", bdesc->devnum);
 596                 dev_print(bdesc);
 597         }
 598         return 0;
 599 }
 600
 601 int scsi_scan_dev(struct udevice *dev, bool verbose)
 602 {
 603         struct scsi_platdata *uc_plat; /* scsi controller platdata */
 604         int ret;
 605         int i;
 606         int lun;
 607
 608         /* probe SCSI controller driver */
 609         ret = device_probe(dev);
 610         if (ret)
 611                 return ret;
 612
 613         /* Get controller platdata */
 614         uc_plat = dev_get_uclass_platdata(dev);
 615
 616         for (i = 0; i < uc_plat->max_id; i++)
 617                 for (lun = 0; lun < uc_plat->max_lun; lun++)
 618                         do_scsi_scan_one(dev, i, lun, verbose);
 619
 620         return 0;
 621 }
 622
 623 int scsi_scan(bool verbose)
 624 {
 625         struct uclass *uc;
 626         struct udevice *dev; /* SCSI controller */
 627         int ret;
 628
 629         if (verbose)
 630                 printf("scanning bus for devices...\n");
 631
 632         blk_unbind_all(IF_TYPE_SCSI);
 633
 634         ret = uclass_get(UCLASS_SCSI, &uc);
 635         if (ret)
 636                 return ret;
 637
 638         uclass_foreach_dev(dev, uc) {
 639                 ret = scsi_scan_dev(dev, verbose);
 640                 if (ret)
 641                         return ret;
 642         }
 643
 644         return 0;
 645 }
 646 #else
 647 int scsi_scan(bool verbose)
 648 {
 649         unsigned char i, lun;
 650         int ret;
 651
 652         if (verbose)
 653                 printf("scanning bus for devices...\n");
 654         for (i = 0; i < CONFIG_SYS_SCSI_MAX_DEVICE; i++)
 655                 scsi_init_dev_desc(&scsi_dev_desc[i], i);
 656
 657         scsi_max_devs = 0;
 658         for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) {
 659                 for (lun = 0; lun < CONFIG_SYS_SCSI_MAX_LUN; lun++) {
 660                         struct blk_desc *bdesc = &scsi_dev_desc[scsi_max_devs];
 661
 662                         ret = scsi_detect_dev(NULL, i, lun, bdesc);
 663                         if (ret)
 664                                 continue;
 665                         part_init(bdesc);
 666
 667                         if (verbose) {
 668                                 printf("  Device %d: ", bdesc->devnum);
 669                                 dev_print(bdesc);
 670                         }
 671                         scsi_max_devs++;
 672                 } /* next LUN */
 673         }
 674         if (scsi_max_devs > 0)
 675                 scsi_curr_dev = 0;
 676         else
 677                 scsi_curr_dev = -1;
 678
 679         printf("Found %d device(s).\n", scsi_max_devs);
 680 #ifndef CONFIG_SPL_BUILD
 681         env_set_ulong("scsidevs", scsi_max_devs);
 682 #endif
 683         return 0;
 684 }
 685 #endif
 686
 687 #ifdef CONFIG_BLK
 688 static const struct blk_ops scsi_blk_ops = {
 689         .read   = scsi_read,
 690         .write  = scsi_write,
 691 };
 692
 693 U_BOOT_DRIVER(scsi_blk) = {
 694         .name           = "scsi_blk",
 695         .id             = UCLASS_BLK,
 696         .ops            = &scsi_blk_ops,
 697 };
 698 #else
 699 U_BOOT_LEGACY_BLK(scsi) = {
 700         .if_typename    = "scsi",
 701         .if_type        = IF_TYPE_SCSI,
 702         .max_devs       = CONFIG_SYS_SCSI_MAX_DEVICE,
 703         .desc           = scsi_dev_desc,
 704 };
 705 #endif