git.sur5r.net Git - u-boot/blob - drivers/scsi/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 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_READ_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_read_ext(struct scsi_cmd *pccb, lbaint_t start,
  87                                 unsigned short blocks)
  88 {
  89         pccb->cmd[0] = SCSI_READ10;
  90         pccb->cmd[1] = pccb->lun << 5;
  91         pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
  92         pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
  93         pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
  94         pccb->cmd[5] = (unsigned char)start & 0xff;
  95         pccb->cmd[6] = 0;
  96         pccb->cmd[7] = (unsigned char)(blocks >> 8) & 0xff;
  97         pccb->cmd[8] = (unsigned char)blocks & 0xff;
  98         pccb->cmd[6] = 0;
  99         pccb->cmdlen = 10;
 100         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 101         debug("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 102               pccb->cmd[0], pccb->cmd[1],
 103               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
 104               pccb->cmd[7], pccb->cmd[8]);
 105 }
 106
 107 static void scsi_setup_write_ext(struct scsi_cmd *pccb, lbaint_t start,
 108                                  unsigned short blocks)
 109 {
 110         pccb->cmd[0] = SCSI_WRITE10;
 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[9] = 0;
 120         pccb->cmdlen = 10;
 121         pccb->msgout[0] = SCSI_IDENTIFY;  /* NOT USED */
 122         debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 123               __func__,
 124               pccb->cmd[0], pccb->cmd[1],
 125               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
 126               pccb->cmd[7], pccb->cmd[8]);
 127 }
 128
 129 static void scsi_setup_inquiry(struct scsi_cmd *pccb)
 130 {
 131         pccb->cmd[0] = SCSI_INQUIRY;
 132         pccb->cmd[1] = pccb->lun << 5;
 133         pccb->cmd[2] = 0;
 134         pccb->cmd[3] = 0;
 135         if (pccb->datalen > 255)
 136                 pccb->cmd[4] = 255;
 137         else
 138                 pccb->cmd[4] = (unsigned char)pccb->datalen;
 139         pccb->cmd[5] = 0;
 140         pccb->cmdlen = 6;
 141         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 142 }
 143
 144 #ifdef CONFIG_BLK
 145 static ulong scsi_read(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
 146                        void *buffer)
 147 #else
 148 static ulong scsi_read(struct blk_desc *block_dev, lbaint_t blknr,
 149                        lbaint_t blkcnt, void *buffer)
 150 #endif
 151 {
 152 #ifdef CONFIG_BLK
 153         struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
 154 #endif
 155         lbaint_t start, blks;
 156         uintptr_t buf_addr;
 157         unsigned short smallblks = 0;
 158         struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
 159
 160         /* Setup device */
 161         pccb->target = block_dev->target;
 162         pccb->lun = block_dev->lun;
 163         buf_addr = (unsigned long)buffer;
 164         start = blknr;
 165         blks = blkcnt;
 166         debug("\nscsi_read: dev %d startblk " LBAF
 167               ", blccnt " LBAF " buffer %lx\n",
 168               block_dev->devnum, start, blks, (unsigned long)buffer);
 169         do {
 170                 pccb->pdata = (unsigned char *)buf_addr;
 171 #ifdef CONFIG_SYS_64BIT_LBA
 172                 if (start > SCSI_LBA48_READ) {
 173                         unsigned long blocks;
 174                         blocks = min_t(lbaint_t, blks, SCSI_MAX_READ_BLK);
 175                         pccb->datalen = block_dev->blksz * blocks;
 176                         scsi_setup_read16(pccb, start, blocks);
 177                         start += blocks;
 178                         blks -= blocks;
 179                 } else
 180 #endif
 181                 if (blks > SCSI_MAX_READ_BLK) {
 182                         pccb->datalen = block_dev->blksz *
 183                                 SCSI_MAX_READ_BLK;
 184                         smallblks = SCSI_MAX_READ_BLK;
 185                         scsi_setup_read_ext(pccb, start, smallblks);
 186                         start += SCSI_MAX_READ_BLK;
 187                         blks -= SCSI_MAX_READ_BLK;
 188                 } else {
 189                         pccb->datalen = block_dev->blksz * blks;
 190                         smallblks = (unsigned short)blks;
 191                         scsi_setup_read_ext(pccb, start, smallblks);
 192                         start += blks;
 193                         blks = 0;
 194                 }
 195                 debug("scsi_read_ext: startblk " LBAF
 196                       ", blccnt %x buffer %" PRIXPTR "\n",
 197                       start, smallblks, buf_addr);
 198                 if (scsi_exec(pccb) != true) {
 199                         scsi_print_error(pccb);
 200                         blkcnt -= blks;
 201                         break;
 202                 }
 203                 buf_addr += pccb->datalen;
 204         } while (blks != 0);
 205         debug("scsi_read_ext: end startblk " LBAF
 206               ", blccnt %x buffer %" PRIXPTR "\n", start, smallblks, buf_addr);
 207         return blkcnt;
 208 }
 209
 210 /*******************************************************************************
 211  * scsi_write
 212  */
 213
 214 /* Almost the maximum amount of the scsi_ext command.. */
 215 #define SCSI_MAX_WRITE_BLK 0xFFFF
 216
 217 #ifdef CONFIG_BLK
 218 static ulong scsi_write(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
 219                         const void *buffer)
 220 #else
 221 static ulong scsi_write(struct blk_desc *block_dev, lbaint_t blknr,
 222                         lbaint_t blkcnt, const void *buffer)
 223 #endif
 224 {
 225 #ifdef CONFIG_BLK
 226         struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
 227 #endif
 228         lbaint_t start, blks;
 229         uintptr_t buf_addr;
 230         unsigned short smallblks;
 231         struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
 232
 233         /* Setup device */
 234         pccb->target = block_dev->target;
 235         pccb->lun = block_dev->lun;
 236         buf_addr = (unsigned long)buffer;
 237         start = blknr;
 238         blks = blkcnt;
 239         debug("\n%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n",
 240               __func__, block_dev->devnum, start, blks, (unsigned long)buffer);
 241         do {
 242                 pccb->pdata = (unsigned char *)buf_addr;
 243                 if (blks > SCSI_MAX_WRITE_BLK) {
 244                         pccb->datalen = (block_dev->blksz *
 245                                          SCSI_MAX_WRITE_BLK);
 246                         smallblks = SCSI_MAX_WRITE_BLK;
 247                         scsi_setup_write_ext(pccb, start, smallblks);
 248                         start += SCSI_MAX_WRITE_BLK;
 249                         blks -= SCSI_MAX_WRITE_BLK;
 250                 } else {
 251                         pccb->datalen = block_dev->blksz * blks;
 252                         smallblks = (unsigned short)blks;
 253                         scsi_setup_write_ext(pccb, start, smallblks);
 254                         start += blks;
 255                         blks = 0;
 256                 }
 257                 debug("%s: startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
 258                       __func__, start, smallblks, buf_addr);
 259                 if (scsi_exec(pccb) != true) {
 260                         scsi_print_error(pccb);
 261                         blkcnt -= blks;
 262                         break;
 263                 }
 264                 buf_addr += pccb->datalen;
 265         } while (blks != 0);
 266         debug("%s: end startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
 267               __func__, start, smallblks, buf_addr);
 268         return blkcnt;
 269 }
 270
 271 #if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT)
 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(1);
 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 scsi_cmd *pccb, lbaint_t *capacity,
 354                               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(pccb) != true)
 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         if (scsi_exec(pccb) != true)
 391                 return 1;
 392
 393         *capacity = ((uint64_t)pccb->pdata[0] << 56) |
 394                     ((uint64_t)pccb->pdata[1] << 48) |
 395                     ((uint64_t)pccb->pdata[2] << 40) |
 396                     ((uint64_t)pccb->pdata[3] << 32) |
 397                     ((uint64_t)pccb->pdata[4] << 24) |
 398                     ((uint64_t)pccb->pdata[5] << 16) |
 399                     ((uint64_t)pccb->pdata[6] << 8)  |
 400                     ((uint64_t)pccb->pdata[7]);
 401
 402         *blksz = ((uint64_t)pccb->pdata[8]  << 56) |
 403                  ((uint64_t)pccb->pdata[9]  << 48) |
 404                  ((uint64_t)pccb->pdata[10] << 40) |
 405                  ((uint64_t)pccb->pdata[11] << 32) |
 406                  ((uint64_t)pccb->pdata[12] << 24) |
 407                  ((uint64_t)pccb->pdata[13] << 16) |
 408                  ((uint64_t)pccb->pdata[14] << 8)  |
 409                  ((uint64_t)pccb->pdata[15]);
 410
 411         return 0;
 412 }
 413
 414
 415 /*
 416  * Some setup (fill-in) routines
 417  */
 418 static void scsi_setup_test_unit_ready(struct scsi_cmd *pccb)
 419 {
 420         pccb->cmd[0] = SCSI_TST_U_RDY;
 421         pccb->cmd[1] = pccb->lun << 5;
 422         pccb->cmd[2] = 0;
 423         pccb->cmd[3] = 0;
 424         pccb->cmd[4] = 0;
 425         pccb->cmd[5] = 0;
 426         pccb->cmdlen = 6;
 427         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 428 }
 429
 430 /**
 431  * scsi_init_dev_desc_priv - initialize only SCSI specific blk_desc properties
 432  *
 433  * @dev_desc: Block device description pointer
 434  */
 435 static void scsi_init_dev_desc_priv(struct blk_desc *dev_desc)
 436 {
 437         dev_desc->target = 0xff;
 438         dev_desc->lun = 0xff;
 439         dev_desc->log2blksz =
 440                 LOG2_INVALID(typeof(dev_desc->log2blksz));
 441         dev_desc->type = DEV_TYPE_UNKNOWN;
 442         dev_desc->vendor[0] = 0;
 443         dev_desc->product[0] = 0;
 444         dev_desc->revision[0] = 0;
 445         dev_desc->removable = false;
 446 #ifndef CONFIG_BLK
 447         dev_desc->block_read = scsi_read;
 448         dev_desc->block_write = scsi_write;
 449 #endif
 450 }
 451
 452 #if !defined(CONFIG_DM_SCSI)
 453 /**
 454  * scsi_init_dev_desc - initialize all SCSI specific blk_desc properties
 455  *
 456  * @dev_desc: Block device description pointer
 457  * @devnum: Device number
 458  */
 459 static void scsi_init_dev_desc(struct blk_desc *dev_desc, int devnum)
 460 {
 461         dev_desc->lba = 0;
 462         dev_desc->blksz = 0;
 463         dev_desc->if_type = IF_TYPE_SCSI;
 464         dev_desc->devnum = devnum;
 465         dev_desc->part_type = PART_TYPE_UNKNOWN;
 466
 467         scsi_init_dev_desc_priv(dev_desc);
 468 }
 469 #endif
 470
 471 /**
 472  * scsi_detect_dev - Detect scsi device
 473  *
 474  * @target: target id
 475  * @lun: target lun
 476  * @dev_desc: block device description
 477  *
 478  * The scsi_detect_dev detects and fills a dev_desc structure when the device is
 479  * detected.
 480  *
 481  * Return: 0 on success, error value otherwise
 482  */
 483 static int scsi_detect_dev(int target, int lun, struct blk_desc *dev_desc)
 484 {
 485         unsigned char perq, modi;
 486         lbaint_t capacity;
 487         unsigned long blksz;
 488         struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
 489
 490         pccb->target = target;
 491         pccb->lun = lun;
 492         pccb->pdata = (unsigned char *)&tempbuff;
 493         pccb->datalen = 512;
 494         scsi_setup_inquiry(pccb);
 495         if (scsi_exec(pccb) != true) {
 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         pccb->datalen = 0;
 525         scsi_setup_test_unit_ready(pccb);
 526         if (scsi_exec(pccb) != true) {
 527                 if (dev_desc->removable) {
 528                         dev_desc->type = perq;
 529                         goto removable;
 530                 }
 531                 scsi_print_error(pccb);
 532                 return -EINVAL;
 533         }
 534         if (scsi_read_capacity(pccb, &capacity, &blksz)) {
 535                 scsi_print_error(pccb);
 536                 return -EINVAL;
 537         }
 538         dev_desc->lba = capacity;
 539         dev_desc->blksz = blksz;
 540         dev_desc->log2blksz = LOG2(dev_desc->blksz);
 541         dev_desc->type = perq;
 542 removable:
 543         return 0;
 544 }
 545
 546 /*
 547  * (re)-scan the scsi bus and reports scsi device info
 548  * to the user if mode = 1
 549  */
 550 #if defined(CONFIG_DM_SCSI)
 551 static int do_scsi_scan_one(struct udevice *dev, int id, int lun, int mode)
 552 {
 553         int ret;
 554         struct udevice *bdev;
 555         struct blk_desc bd;
 556         struct blk_desc *bdesc;
 557         char str[10];
 558
 559         /*
 560          * detect the scsi driver to get information about its geometry (block
 561          * size, number of blocks) and other parameters (ids, type, ...)
 562          */
 563         scsi_init_dev_desc_priv(&bd);
 564         if (scsi_detect_dev(id, lun, &bd))
 565                 return -ENODEV;
 566
 567         /*
 568         * Create only one block device and do detection
 569         * to make sure that there won't be a lot of
 570         * block devices created
 571         */
 572         snprintf(str, sizeof(str), "id%dlun%d", id, lun);
 573         ret = blk_create_devicef(dev, "scsi_blk", str, IF_TYPE_SCSI, -1,
 574                         bd.blksz, bd.blksz * bd.lba, &bdev);
 575         if (ret) {
 576                 debug("Can't create device\n");
 577                 return ret;
 578         }
 579
 580         bdesc = dev_get_uclass_platdata(bdev);
 581         bdesc->target = id;
 582         bdesc->lun = lun;
 583         bdesc->removable = bd.removable;
 584         bdesc->type = bd.type;
 585         memcpy(&bdesc->vendor, &bd.vendor, sizeof(bd.vendor));
 586         memcpy(&bdesc->product, &bd.product, sizeof(bd.product));
 587         memcpy(&bdesc->revision, &bd.revision,  sizeof(bd.revision));
 588         part_init(bdesc);
 589
 590         if (mode == 1) {
 591                 printf("  Device %d: ", 0);
 592                 dev_print(bdesc);
 593         }
 594         return 0;
 595 }
 596
 597 int scsi_scan(int mode)
 598 {
 599         unsigned char i, lun;
 600         struct uclass *uc;
 601         struct udevice *dev; /* SCSI controller */
 602         int ret;
 603
 604         if (mode == 1)
 605                 printf("scanning bus for devices...\n");
 606
 607         blk_unbind_all(IF_TYPE_SCSI);
 608
 609         ret = uclass_get(UCLASS_SCSI, &uc);
 610         if (ret)
 611                 return ret;
 612
 613         uclass_foreach_dev(dev, uc) {
 614                 struct scsi_platdata *plat; /* scsi controller platdata */
 615
 616                 /* probe SCSI controller driver */
 617                 ret = device_probe(dev);
 618                 if (ret)
 619                         return ret;
 620
 621                 /* Get controller platdata */
 622                 plat = dev_get_uclass_platdata(dev);
 623
 624                 for (i = 0; i < plat->max_id; i++)
 625                         for (lun = 0; lun < plat->max_lun; lun++)
 626                                 do_scsi_scan_one(dev, i, lun, mode);
 627         }
 628
 629         return 0;
 630 }
 631 #else
 632 int scsi_scan(int mode)
 633 {
 634         unsigned char i, lun;
 635         int ret;
 636
 637         if (mode == 1)
 638                 printf("scanning bus for devices...\n");
 639         for (i = 0; i < CONFIG_SYS_SCSI_MAX_DEVICE; i++)
 640                 scsi_init_dev_desc(&scsi_dev_desc[i], i);
 641
 642         scsi_max_devs = 0;
 643         for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) {
 644                 for (lun = 0; lun < CONFIG_SYS_SCSI_MAX_LUN; lun++) {
 645                         ret = scsi_detect_dev(i, lun,
 646                                               &scsi_dev_desc[scsi_max_devs]);
 647                         if (ret)
 648                                 continue;
 649                         part_init(&scsi_dev_desc[scsi_max_devs]);
 650
 651                         if (mode == 1) {
 652                                 printf("  Device %d: ", 0);
 653                                 dev_print(&scsi_dev_desc[scsi_max_devs]);
 654                         } /* if mode */
 655                         scsi_max_devs++;
 656                 } /* next LUN */
 657         }
 658         if (scsi_max_devs > 0)
 659                 scsi_curr_dev = 0;
 660         else
 661                 scsi_curr_dev = -1;
 662
 663         printf("Found %d device(s).\n", scsi_max_devs);
 664 #ifndef CONFIG_SPL_BUILD
 665         setenv_ulong("scsidevs", scsi_max_devs);
 666 #endif
 667         return 0;
 668 }
 669 #endif
 670
 671 #ifdef CONFIG_BLK
 672 static const struct blk_ops scsi_blk_ops = {
 673         .read   = scsi_read,
 674         .write  = scsi_write,
 675 };
 676
 677 U_BOOT_DRIVER(scsi_blk) = {
 678         .name           = "scsi_blk",
 679         .id             = UCLASS_BLK,
 680         .ops            = &scsi_blk_ops,
 681 };
 682 #else
 683 U_BOOT_LEGACY_BLK(scsi) = {
 684         .if_typename    = "scsi",
 685         .if_type        = IF_TYPE_SCSI,
 686         .max_devs       = CONFIG_SYS_SCSI_MAX_DEVICE,
 687         .desc           = scsi_dev_desc,
 688 };
 689 #endif