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 <blk.h>
   9 #include <bootstage.h>
  10 #include <dm.h>
  11 #include <env.h>
  12 #include <libata.h>
  13 #include <log.h>
  14 #include <part.h>
  15 #include <pci.h>
  16 #include <scsi.h>
  17 #include <dm/device-internal.h>
  18 #include <dm/uclass-internal.h>
  19
  20 #if !defined(CONFIG_DM_SCSI)
  21 # ifdef CONFIG_SCSI_DEV_LIST
  22 #  define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
  23 # else
  24 #  ifdef CONFIG_SATA_ULI5288
  25
  26 #   define SCSI_VEND_ID 0x10b9
  27 #   define SCSI_DEV_ID  0x5288
  28
  29 #  elif !defined(CONFIG_SCSI_AHCI_PLAT)
  30 #   error no scsi device defined
  31 #  endif
  32 # define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
  33 # endif
  34 #endif
  35
  36 #if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT) && \
  37         !defined(CONFIG_DM_SCSI)
  38 const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
  39 #endif
  40 static struct scsi_cmd tempccb; /* temporary scsi command buffer */
  41
  42 static unsigned char tempbuff[512]; /* temporary data buffer */
  43
  44 #if !defined(CONFIG_DM_SCSI)
  45 static int scsi_max_devs; /* number of highest available scsi device */
  46
  47 static int scsi_curr_dev; /* current device */
  48
  49 static struct blk_desc scsi_dev_desc[CONFIG_SYS_SCSI_MAX_DEVICE];
  50 #endif
  51
  52 /* almost the maximum amount of the scsi_ext command.. */
  53 #define SCSI_MAX_BLK 0xFFFF
  54 #define SCSI_LBA48_READ 0xFFFFFFF
  55
  56 static void scsi_print_error(struct scsi_cmd *pccb)
  57 {
  58         /* Dummy function that could print an error for debugging */
  59 }
  60
  61 #ifdef CONFIG_SYS_64BIT_LBA
  62 void scsi_setup_read16(struct scsi_cmd *pccb, lbaint_t start,
  63                        unsigned long blocks)
  64 {
  65         pccb->cmd[0] = SCSI_READ16;
  66         pccb->cmd[1] = pccb->lun << 5;
  67         pccb->cmd[2] = (unsigned char)(start >> 56) & 0xff;
  68         pccb->cmd[3] = (unsigned char)(start >> 48) & 0xff;
  69         pccb->cmd[4] = (unsigned char)(start >> 40) & 0xff;
  70         pccb->cmd[5] = (unsigned char)(start >> 32) & 0xff;
  71         pccb->cmd[6] = (unsigned char)(start >> 24) & 0xff;
  72         pccb->cmd[7] = (unsigned char)(start >> 16) & 0xff;
  73         pccb->cmd[8] = (unsigned char)(start >> 8) & 0xff;
  74         pccb->cmd[9] = (unsigned char)start & 0xff;
  75         pccb->cmd[10] = 0;
  76         pccb->cmd[11] = (unsigned char)(blocks >> 24) & 0xff;
  77         pccb->cmd[12] = (unsigned char)(blocks >> 16) & 0xff;
  78         pccb->cmd[13] = (unsigned char)(blocks >> 8) & 0xff;
  79         pccb->cmd[14] = (unsigned char)blocks & 0xff;
  80         pccb->cmd[15] = 0;
  81         pccb->cmdlen = 16;
  82         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
  83         debug("scsi_setup_read16: cmd: %02X %02X startblk %02X%02X%02X%02X%02X%02X%02X%02X blccnt %02X%02X%02X%02X\n",
  84               pccb->cmd[0], pccb->cmd[1],
  85               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
  86               pccb->cmd[6], pccb->cmd[7], pccb->cmd[8], pccb->cmd[9],
  87               pccb->cmd[11], pccb->cmd[12], pccb->cmd[13], pccb->cmd[14]);
  88 }
  89 #endif
  90
  91 static void scsi_setup_inquiry(struct scsi_cmd *pccb)
  92 {
  93         pccb->cmd[0] = SCSI_INQUIRY;
  94         pccb->cmd[1] = pccb->lun << 5;
  95         pccb->cmd[2] = 0;
  96         pccb->cmd[3] = 0;
  97         if (pccb->datalen > 255)
  98                 pccb->cmd[4] = 255;
  99         else
 100                 pccb->cmd[4] = (unsigned char)pccb->datalen;
 101         pccb->cmd[5] = 0;
 102         pccb->cmdlen = 6;
 103         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 104 }
 105
 106 #ifdef CONFIG_BLK
 107 static void scsi_setup_read_ext(struct scsi_cmd *pccb, lbaint_t start,
 108                                 unsigned short blocks)
 109 {
 110         pccb->cmd[0] = SCSI_READ10;
 111         pccb->cmd[1] = pccb->lun << 5;
 112         pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
 113         pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
 114         pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
 115         pccb->cmd[5] = (unsigned char)start & 0xff;
 116         pccb->cmd[6] = 0;
 117         pccb->cmd[7] = (unsigned char)(blocks >> 8) & 0xff;
 118         pccb->cmd[8] = (unsigned char)blocks & 0xff;
 119         pccb->cmd[6] = 0;
 120         pccb->cmdlen = 10;
 121         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 122         debug("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 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_write_ext(struct scsi_cmd *pccb, lbaint_t start,
 129                                  unsigned short blocks)
 130 {
 131         pccb->cmd[0] = SCSI_WRITE10;
 132         pccb->cmd[1] = pccb->lun << 5;
 133         pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
 134         pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
 135         pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
 136         pccb->cmd[5] = (unsigned char)start & 0xff;
 137         pccb->cmd[6] = 0;
 138         pccb->cmd[7] = ((unsigned char)(blocks >> 8)) & 0xff;
 139         pccb->cmd[8] = (unsigned char)blocks & 0xff;
 140         pccb->cmd[9] = 0;
 141         pccb->cmdlen = 10;
 142         pccb->msgout[0] = SCSI_IDENTIFY;  /* NOT USED */
 143         debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 144               __func__,
 145               pccb->cmd[0], pccb->cmd[1],
 146               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
 147               pccb->cmd[7], pccb->cmd[8]);
 148 }
 149
 150 static ulong scsi_read(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
 151                        void *buffer)
 152 {
 153         struct blk_desc *block_dev = dev_get_uclass_plat(dev);
 154         struct udevice *bdev = dev->parent;
 155         struct scsi_plat *uc_plat = dev_get_uclass_plat(bdev);
 156         lbaint_t start, blks, max_blks;
 157         uintptr_t buf_addr;
 158         unsigned short smallblks = 0;
 159         struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
 160
 161         /* Setup device */
 162         pccb->target = block_dev->target;
 163         pccb->lun = block_dev->lun;
 164         buf_addr = (unsigned long)buffer;
 165         start = blknr;
 166         blks = blkcnt;
 167         if (uc_plat->max_bytes_per_req)
 168                 max_blks = uc_plat->max_bytes_per_req / block_dev->blksz;
 169         else
 170                 max_blks = SCSI_MAX_BLK;
 171
 172         debug("\nscsi_read: dev %d startblk " LBAF
 173               ", blccnt " LBAF " buffer %lx\n",
 174               block_dev->devnum, start, blks, (unsigned long)buffer);
 175         do {
 176                 pccb->pdata = (unsigned char *)buf_addr;
 177                 pccb->dma_dir = DMA_FROM_DEVICE;
 178 #ifdef CONFIG_SYS_64BIT_LBA
 179                 if (start > SCSI_LBA48_READ) {
 180                         unsigned long blocks;
 181                         blocks = min_t(lbaint_t, blks, max_blks);
 182                         pccb->datalen = block_dev->blksz * blocks;
 183                         scsi_setup_read16(pccb, start, blocks);
 184                         start += blocks;
 185                         blks -= blocks;
 186                 } else
 187 #endif
 188                 if (blks > max_blks) {
 189                         pccb->datalen = block_dev->blksz * max_blks;
 190                         smallblks = max_blks;
 191                         scsi_setup_read_ext(pccb, start, smallblks);
 192                         start += max_blks;
 193                         blks -= max_blks;
 194                 } else {
 195                         pccb->datalen = block_dev->blksz * blks;
 196                         smallblks = (unsigned short)blks;
 197                         scsi_setup_read_ext(pccb, start, smallblks);
 198                         start += blks;
 199                         blks = 0;
 200                 }
 201                 debug("scsi_read_ext: startblk " LBAF
 202                       ", blccnt %x buffer %lX\n",
 203                       start, smallblks, buf_addr);
 204                 if (scsi_exec(bdev, pccb)) {
 205                         scsi_print_error(pccb);
 206                         blkcnt -= blks;
 207                         break;
 208                 }
 209                 buf_addr += pccb->datalen;
 210         } while (blks != 0);
 211         debug("scsi_read_ext: end startblk " LBAF
 212               ", blccnt %x buffer %lX\n", start, smallblks, buf_addr);
 213         return blkcnt;
 214 }
 215
 216 /*******************************************************************************
 217  * scsi_write
 218  */
 219
 220 static ulong scsi_write(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
 221                         const void *buffer)
 222 {
 223         struct blk_desc *block_dev = dev_get_uclass_plat(dev);
 224         struct udevice *bdev = dev->parent;
 225         struct scsi_plat *uc_plat = dev_get_uclass_plat(bdev);
 226         lbaint_t start, blks, max_blks;
 227         uintptr_t buf_addr;
 228         unsigned short smallblks;
 229         struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
 230
 231         /* Setup device */
 232         pccb->target = block_dev->target;
 233         pccb->lun = block_dev->lun;
 234         buf_addr = (unsigned long)buffer;
 235         start = blknr;
 236         blks = blkcnt;
 237         if (uc_plat->max_bytes_per_req)
 238                 max_blks = uc_plat->max_bytes_per_req / block_dev->blksz;
 239         else
 240                 max_blks = SCSI_MAX_BLK;
 241
 242         debug("\n%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n",
 243               __func__, block_dev->devnum, start, blks, (unsigned long)buffer);
 244         do {
 245                 pccb->pdata = (unsigned char *)buf_addr;
 246                 pccb->dma_dir = DMA_TO_DEVICE;
 247                 if (blks > max_blks) {
 248                         pccb->datalen = block_dev->blksz * max_blks;
 249                         smallblks = max_blks;
 250                         scsi_setup_write_ext(pccb, start, smallblks);
 251                         start += max_blks;
 252                         blks -= max_blks;
 253                 } else {
 254                         pccb->datalen = block_dev->blksz * blks;
 255                         smallblks = (unsigned short)blks;
 256                         scsi_setup_write_ext(pccb, start, smallblks);
 257                         start += blks;
 258                         blks = 0;
 259                 }
 260                 debug("%s: startblk " LBAF ", blccnt %x buffer %lx\n",
 261                       __func__, start, smallblks, buf_addr);
 262                 if (scsi_exec(bdev, pccb)) {
 263                         scsi_print_error(pccb);
 264                         blkcnt -= blks;
 265                         break;
 266                 }
 267                 buf_addr += pccb->datalen;
 268         } while (blks != 0);
 269         debug("%s: end startblk " LBAF ", blccnt %x buffer %lX\n",
 270               __func__, start, smallblks, buf_addr);
 271         return blkcnt;
 272 }
 273 #endif
 274
 275 #if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT) && \
 276         !defined(CONFIG_DM_SCSI)
 277 void scsi_init(void)
 278 {
 279         int busdevfunc = -1;
 280         int i;
 281         /*
 282          * Find a device from the list, this driver will support a single
 283          * controller.
 284          */
 285         for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
 286                 /* get PCI Device ID */
 287 #ifdef CONFIG_DM_PCI
 288                 struct udevice *dev;
 289                 int ret;
 290
 291                 ret = dm_pci_find_device(scsi_device_list[i].vendor,
 292                                          scsi_device_list[i].device, 0, &dev);
 293                 if (!ret) {
 294                         busdevfunc = dm_pci_get_bdf(dev);
 295                         break;
 296                 }
 297 #else
 298                 busdevfunc = pci_find_device(scsi_device_list[i].vendor,
 299                                              scsi_device_list[i].device,
 300                                              0);
 301 #endif
 302                 if (busdevfunc != -1)
 303                         break;
 304         }
 305
 306         if (busdevfunc == -1) {
 307                 printf("Error: SCSI Controller(s) ");
 308                 for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
 309                         printf("%04X:%04X ",
 310                                scsi_device_list[i].vendor,
 311                                scsi_device_list[i].device);
 312                 }
 313                 printf("not found\n");
 314                 return;
 315         }
 316 #ifdef DEBUG
 317         else {
 318                 printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",
 319                        scsi_device_list[i].vendor,
 320                        scsi_device_list[i].device,
 321                        (busdevfunc >> 16) & 0xFF,
 322                        (busdevfunc >> 11) & 0x1F,
 323                        (busdevfunc >> 8) & 0x7);
 324         }
 325 #endif
 326         bootstage_start(BOOTSTAGE_ID_ACCUM_SCSI, "ahci");
 327         scsi_low_level_init(busdevfunc);
 328         scsi_scan(true);
 329         bootstage_accum(BOOTSTAGE_ID_ACCUM_SCSI);
 330 }
 331 #endif
 332
 333 /* copy src to dest, skipping leading and trailing blanks
 334  * and null terminate the string
 335  */
 336 static void scsi_ident_cpy(unsigned char *dest, unsigned char *src,
 337                            unsigned int len)
 338 {
 339         int start, end;
 340
 341         start = 0;
 342         while (start < len) {
 343                 if (src[start] != ' ')
 344                         break;
 345                 start++;
 346         }
 347         end = len-1;
 348         while (end > start) {
 349                 if (src[end] != ' ')
 350                         break;
 351                 end--;
 352         }
 353         for (; start <= end; start++)
 354                 *dest ++= src[start];
 355         *dest = '\0';
 356 }
 357
 358 static int scsi_read_capacity(struct udevice *dev, struct scsi_cmd *pccb,
 359                               lbaint_t *capacity, unsigned long *blksz)
 360 {
 361         *capacity = 0;
 362
 363         memset(pccb->cmd, '\0', sizeof(pccb->cmd));
 364         pccb->cmd[0] = SCSI_RD_CAPAC10;
 365         pccb->cmd[1] = pccb->lun << 5;
 366         pccb->cmdlen = 10;
 367         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 368
 369         pccb->datalen = 8;
 370         if (scsi_exec(dev, pccb))
 371                 return 1;
 372
 373         *capacity = ((lbaint_t)pccb->pdata[0] << 24) |
 374                     ((lbaint_t)pccb->pdata[1] << 16) |
 375                     ((lbaint_t)pccb->pdata[2] << 8)  |
 376                     ((lbaint_t)pccb->pdata[3]);
 377
 378         if (*capacity != 0xffffffff) {
 379                 /* Read capacity (10) was sufficient for this drive. */
 380                 *blksz = ((unsigned long)pccb->pdata[4] << 24) |
 381                          ((unsigned long)pccb->pdata[5] << 16) |
 382                          ((unsigned long)pccb->pdata[6] << 8)  |
 383                          ((unsigned long)pccb->pdata[7]);
 384                 return 0;
 385         }
 386
 387         /* Read capacity (10) was insufficient. Use read capacity (16). */
 388         memset(pccb->cmd, '\0', sizeof(pccb->cmd));
 389         pccb->cmd[0] = SCSI_RD_CAPAC16;
 390         pccb->cmd[1] = 0x10;
 391         pccb->cmdlen = 16;
 392         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 393
 394         pccb->datalen = 16;
 395         pccb->dma_dir = DMA_FROM_DEVICE;
 396         if (scsi_exec(dev, pccb))
 397                 return 1;
 398
 399         *capacity = ((uint64_t)pccb->pdata[0] << 56) |
 400                     ((uint64_t)pccb->pdata[1] << 48) |
 401                     ((uint64_t)pccb->pdata[2] << 40) |
 402                     ((uint64_t)pccb->pdata[3] << 32) |
 403                     ((uint64_t)pccb->pdata[4] << 24) |
 404                     ((uint64_t)pccb->pdata[5] << 16) |
 405                     ((uint64_t)pccb->pdata[6] << 8)  |
 406                     ((uint64_t)pccb->pdata[7]);
 407
 408         *blksz = ((uint64_t)pccb->pdata[8]  << 56) |
 409                  ((uint64_t)pccb->pdata[9]  << 48) |
 410                  ((uint64_t)pccb->pdata[10] << 40) |
 411                  ((uint64_t)pccb->pdata[11] << 32) |
 412                  ((uint64_t)pccb->pdata[12] << 24) |
 413                  ((uint64_t)pccb->pdata[13] << 16) |
 414                  ((uint64_t)pccb->pdata[14] << 8)  |
 415                  ((uint64_t)pccb->pdata[15]);
 416
 417         return 0;
 418 }
 419
 420
 421 /*
 422  * Some setup (fill-in) routines
 423  */
 424 static void scsi_setup_test_unit_ready(struct scsi_cmd *pccb)
 425 {
 426         pccb->cmd[0] = SCSI_TST_U_RDY;
 427         pccb->cmd[1] = pccb->lun << 5;
 428         pccb->cmd[2] = 0;
 429         pccb->cmd[3] = 0;
 430         pccb->cmd[4] = 0;
 431         pccb->cmd[5] = 0;
 432         pccb->cmdlen = 6;
 433         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 434 }
 435
 436 /**
 437  * scsi_init_dev_desc_priv - initialize only SCSI specific blk_desc properties
 438  *
 439  * @dev_desc: Block device description pointer
 440  */
 441 static void scsi_init_dev_desc_priv(struct blk_desc *dev_desc)
 442 {
 443         dev_desc->target = 0xff;
 444         dev_desc->lun = 0xff;
 445         dev_desc->log2blksz =
 446                 LOG2_INVALID(typeof(dev_desc->log2blksz));
 447         dev_desc->type = DEV_TYPE_UNKNOWN;
 448         dev_desc->vendor[0] = 0;
 449         dev_desc->product[0] = 0;
 450         dev_desc->revision[0] = 0;
 451         dev_desc->removable = false;
 452 }
 453
 454 #if !defined(CONFIG_DM_SCSI)
 455 /**
 456  * scsi_init_dev_desc - initialize all SCSI specific blk_desc properties
 457  *
 458  * @dev_desc: Block device description pointer
 459  * @devnum: Device number
 460  */
 461 static void scsi_init_dev_desc(struct blk_desc *dev_desc, int devnum)
 462 {
 463         dev_desc->lba = 0;
 464         dev_desc->blksz = 0;
 465         dev_desc->if_type = IF_TYPE_SCSI;
 466         dev_desc->devnum = devnum;
 467         dev_desc->part_type = PART_TYPE_UNKNOWN;
 468
 469         scsi_init_dev_desc_priv(dev_desc);
 470 }
 471 #endif
 472
 473 /**
 474  * scsi_detect_dev - Detect scsi device
 475  *
 476  * @target: target id
 477  * @lun: target lun
 478  * @dev_desc: block device description
 479  *
 480  * The scsi_detect_dev detects and fills a dev_desc structure when the device is
 481  * detected.
 482  *
 483  * Return: 0 on success, error value otherwise
 484  */
 485 static int scsi_detect_dev(struct udevice *dev, int target, int lun,
 486                            struct blk_desc *dev_desc)
 487 {
 488         unsigned char perq, modi;
 489         lbaint_t capacity;
 490         unsigned long blksz;
 491         struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
 492         int count, err;
 493
 494         pccb->target = target;
 495         pccb->lun = lun;
 496         pccb->pdata = (unsigned char *)&tempbuff;
 497         pccb->datalen = 512;
 498         pccb->dma_dir = DMA_FROM_DEVICE;
 499         scsi_setup_inquiry(pccb);
 500         if (scsi_exec(dev, pccb)) {
 501                 if (pccb->contr_stat == SCSI_SEL_TIME_OUT) {
 502                         /*
 503                           * selection timeout => assuming no
 504                           * device present
 505                           */
 506                         debug("Selection timeout ID %d\n",
 507                               pccb->target);
 508                         return -ETIMEDOUT;
 509                 }
 510                 scsi_print_error(pccb);
 511                 return -ENODEV;
 512         }
 513         perq = tempbuff[0];
 514         modi = tempbuff[1];
 515         if ((perq & 0x1f) == 0x1f)
 516                 return -ENODEV; /* skip unknown devices */
 517         if ((modi & 0x80) == 0x80) /* drive is removable */
 518                 dev_desc->removable = true;
 519         /* get info for this device */
 520         scsi_ident_cpy((unsigned char *)dev_desc->vendor,
 521                        &tempbuff[8], 8);
 522         scsi_ident_cpy((unsigned char *)dev_desc->product,
 523                        &tempbuff[16], 16);
 524         scsi_ident_cpy((unsigned char *)dev_desc->revision,
 525                        &tempbuff[32], 4);
 526         dev_desc->target = pccb->target;
 527         dev_desc->lun = pccb->lun;
 528
 529         for (count = 0; count < 3; count++) {
 530                 pccb->datalen = 0;
 531                 scsi_setup_test_unit_ready(pccb);
 532                 err = scsi_exec(dev, pccb);
 533                 if (!err)
 534                         break;
 535         }
 536         if (err) {
 537                 if (dev_desc->removable) {
 538                         dev_desc->type = perq;
 539                         goto removable;
 540                 }
 541                 scsi_print_error(pccb);
 542                 return -EINVAL;
 543         }
 544         if (scsi_read_capacity(dev, pccb, &capacity, &blksz)) {
 545                 scsi_print_error(pccb);
 546                 return -EINVAL;
 547         }
 548         dev_desc->lba = capacity;
 549         dev_desc->blksz = blksz;
 550         dev_desc->log2blksz = LOG2(dev_desc->blksz);
 551         dev_desc->type = perq;
 552 removable:
 553         return 0;
 554 }
 555
 556 /*
 557  * (re)-scan the scsi bus and reports scsi device info
 558  * to the user if mode = 1
 559  */
 560 #if defined(CONFIG_DM_SCSI)
 561 static int do_scsi_scan_one(struct udevice *dev, int id, int lun, bool verbose)
 562 {
 563         int ret;
 564         struct udevice *bdev;
 565         struct blk_desc bd;
 566         struct blk_desc *bdesc;
 567         char str[10];
 568
 569         /*
 570          * detect the scsi driver to get information about its geometry (block
 571          * size, number of blocks) and other parameters (ids, type, ...)
 572          */
 573         scsi_init_dev_desc_priv(&bd);
 574         if (scsi_detect_dev(dev, id, lun, &bd))
 575                 return -ENODEV;
 576
 577         /*
 578         * Create only one block device and do detection
 579         * to make sure that there won't be a lot of
 580         * block devices created
 581         */
 582         snprintf(str, sizeof(str), "id%dlun%d", id, lun);
 583         ret = blk_create_devicef(dev, "scsi_blk", str, IF_TYPE_SCSI, -1,
 584                         bd.blksz, bd.lba, &bdev);
 585         if (ret) {
 586                 debug("Can't create device\n");
 587                 return ret;
 588         }
 589
 590         bdesc = dev_get_uclass_plat(bdev);
 591         bdesc->target = id;
 592         bdesc->lun = lun;
 593         bdesc->removable = bd.removable;
 594         bdesc->type = bd.type;
 595         memcpy(&bdesc->vendor, &bd.vendor, sizeof(bd.vendor));
 596         memcpy(&bdesc->product, &bd.product, sizeof(bd.product));
 597         memcpy(&bdesc->revision, &bd.revision,  sizeof(bd.revision));
 598         if (IS_ENABLED(CONFIG_SYS_BIG_ENDIAN)) {
 599                 ata_swap_buf_le16((u16 *)&bdesc->vendor, sizeof(bd.vendor) / 2);
 600                 ata_swap_buf_le16((u16 *)&bdesc->product, sizeof(bd.product) / 2);
 601                 ata_swap_buf_le16((u16 *)&bdesc->revision, sizeof(bd.revision) / 2);
 602         }
 603
 604         if (verbose) {
 605                 printf("  Device %d: ", bdesc->devnum);
 606                 dev_print(bdesc);
 607         }
 608         return 0;
 609 }
 610
 611 int scsi_scan_dev(struct udevice *dev, bool verbose)
 612 {
 613         struct scsi_plat *uc_plat; /* scsi controller plat */
 614         int ret;
 615         int i;
 616         int lun;
 617
 618         /* probe SCSI controller driver */
 619         ret = device_probe(dev);
 620         if (ret)
 621                 return ret;
 622
 623         /* Get controller plat */
 624         uc_plat = dev_get_uclass_plat(dev);
 625
 626         for (i = 0; i < uc_plat->max_id; i++)
 627                 for (lun = 0; lun < uc_plat->max_lun; lun++)
 628                         do_scsi_scan_one(dev, i, lun, verbose);
 629
 630         return 0;
 631 }
 632
 633 int scsi_scan(bool verbose)
 634 {
 635         struct uclass *uc;
 636         struct udevice *dev; /* SCSI controller */
 637         int ret;
 638
 639         if (verbose)
 640                 printf("scanning bus for devices...\n");
 641
 642         blk_unbind_all(IF_TYPE_SCSI);
 643
 644         ret = uclass_get(UCLASS_SCSI, &uc);
 645         if (ret)
 646                 return ret;
 647
 648         uclass_foreach_dev(dev, uc) {
 649                 ret = scsi_scan_dev(dev, verbose);
 650                 if (ret)
 651                         return ret;
 652         }
 653
 654         return 0;
 655 }
 656 #else
 657 int scsi_scan(bool verbose)
 658 {
 659         unsigned char i, lun;
 660         int ret;
 661
 662         if (verbose)
 663                 printf("scanning bus for devices...\n");
 664         for (i = 0; i < CONFIG_SYS_SCSI_MAX_DEVICE; i++)
 665                 scsi_init_dev_desc(&scsi_dev_desc[i], i);
 666
 667         scsi_max_devs = 0;
 668         for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) {
 669                 for (lun = 0; lun < CONFIG_SYS_SCSI_MAX_LUN; lun++) {
 670                         struct blk_desc *bdesc = &scsi_dev_desc[scsi_max_devs];
 671
 672                         ret = scsi_detect_dev(NULL, i, lun, bdesc);
 673                         if (ret)
 674                                 continue;
 675                         part_init(bdesc);
 676
 677                         if (verbose) {
 678                                 printf("  Device %d: ", bdesc->devnum);
 679                                 dev_print(bdesc);
 680                         }
 681                         scsi_max_devs++;
 682                 } /* next LUN */
 683         }
 684         if (scsi_max_devs > 0)
 685                 scsi_curr_dev = 0;
 686         else
 687                 scsi_curr_dev = -1;
 688
 689         printf("Found %d device(s).\n", scsi_max_devs);
 690 #ifndef CONFIG_SPL_BUILD
 691         env_set_ulong("scsidevs", scsi_max_devs);
 692 #endif
 693         return 0;
 694 }
 695 #endif
 696
 697 #ifdef CONFIG_BLK
 698 static const struct blk_ops scsi_blk_ops = {
 699         .read   = scsi_read,
 700         .write  = scsi_write,
 701 };
 702
 703 U_BOOT_DRIVER(scsi_blk) = {
 704         .name           = "scsi_blk",
 705         .id             = UCLASS_BLK,
 706         .ops            = &scsi_blk_ops,
 707 };
 708 #else
 709 U_BOOT_LEGACY_BLK(scsi) = {
 710         .if_typename    = "scsi",
 711         .if_type        = IF_TYPE_SCSI,
 712         .max_devs       = CONFIG_SYS_SCSI_MAX_DEVICE,
 713         .desc           = scsi_dev_desc,
 714 };
 715 #endif