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         !defined(CONFIG_DM_SCSI)
  34 const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
  35 #endif
  36 static struct scsi_cmd tempccb; /* temporary scsi command buffer */
  37
  38 static unsigned char tempbuff[512]; /* temporary data buffer */
  39
  40 #if !defined(CONFIG_DM_SCSI)
  41 static int scsi_max_devs; /* number of highest available scsi device */
  42
  43 static int scsi_curr_dev; /* current device */
  44
  45 static struct blk_desc scsi_dev_desc[CONFIG_SYS_SCSI_MAX_DEVICE];
  46 #endif
  47
  48 /* almost the maximum amount of the scsi_ext command.. */
  49 #define SCSI_MAX_READ_BLK 0xFFFF
  50 #define SCSI_LBA48_READ 0xFFFFFFF
  51
  52 static void scsi_print_error(struct scsi_cmd *pccb)
  53 {
  54         /* Dummy function that could print an error for debugging */
  55 }
  56
  57 #ifdef CONFIG_SYS_64BIT_LBA
  58 void scsi_setup_read16(struct scsi_cmd *pccb, lbaint_t start,
  59                        unsigned long blocks)
  60 {
  61         pccb->cmd[0] = SCSI_READ16;
  62         pccb->cmd[1] = pccb->lun << 5;
  63         pccb->cmd[2] = (unsigned char)(start >> 56) & 0xff;
  64         pccb->cmd[3] = (unsigned char)(start >> 48) & 0xff;
  65         pccb->cmd[4] = (unsigned char)(start >> 40) & 0xff;
  66         pccb->cmd[5] = (unsigned char)(start >> 32) & 0xff;
  67         pccb->cmd[6] = (unsigned char)(start >> 24) & 0xff;
  68         pccb->cmd[7] = (unsigned char)(start >> 16) & 0xff;
  69         pccb->cmd[8] = (unsigned char)(start >> 8) & 0xff;
  70         pccb->cmd[9] = (unsigned char)start & 0xff;
  71         pccb->cmd[10] = 0;
  72         pccb->cmd[11] = (unsigned char)(blocks >> 24) & 0xff;
  73         pccb->cmd[12] = (unsigned char)(blocks >> 16) & 0xff;
  74         pccb->cmd[13] = (unsigned char)(blocks >> 8) & 0xff;
  75         pccb->cmd[14] = (unsigned char)blocks & 0xff;
  76         pccb->cmd[15] = 0;
  77         pccb->cmdlen = 16;
  78         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
  79         debug("scsi_setup_read16: cmd: %02X %02X startblk %02X%02X%02X%02X%02X%02X%02X%02X blccnt %02X%02X%02X%02X\n",
  80               pccb->cmd[0], pccb->cmd[1],
  81               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
  82               pccb->cmd[6], pccb->cmd[7], pccb->cmd[8], pccb->cmd[9],
  83               pccb->cmd[11], pccb->cmd[12], pccb->cmd[13], pccb->cmd[14]);
  84 }
  85 #endif
  86
  87 static void scsi_setup_read_ext(struct scsi_cmd *pccb, lbaint_t start,
  88                                 unsigned short blocks)
  89 {
  90         pccb->cmd[0] = SCSI_READ10;
  91         pccb->cmd[1] = pccb->lun << 5;
  92         pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
  93         pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
  94         pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
  95         pccb->cmd[5] = (unsigned char)start & 0xff;
  96         pccb->cmd[6] = 0;
  97         pccb->cmd[7] = (unsigned char)(blocks >> 8) & 0xff;
  98         pccb->cmd[8] = (unsigned char)blocks & 0xff;
  99         pccb->cmd[6] = 0;
 100         pccb->cmdlen = 10;
 101         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 102         debug("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 103               pccb->cmd[0], pccb->cmd[1],
 104               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
 105               pccb->cmd[7], pccb->cmd[8]);
 106 }
 107
 108 static void scsi_setup_write_ext(struct scsi_cmd *pccb, lbaint_t start,
 109                                  unsigned short blocks)
 110 {
 111         pccb->cmd[0] = SCSI_WRITE10;
 112         pccb->cmd[1] = pccb->lun << 5;
 113         pccb->cmd[2] = (unsigned char)(start >> 24) & 0xff;
 114         pccb->cmd[3] = (unsigned char)(start >> 16) & 0xff;
 115         pccb->cmd[4] = (unsigned char)(start >> 8) & 0xff;
 116         pccb->cmd[5] = (unsigned char)start & 0xff;
 117         pccb->cmd[6] = 0;
 118         pccb->cmd[7] = ((unsigned char)(blocks >> 8)) & 0xff;
 119         pccb->cmd[8] = (unsigned char)blocks & 0xff;
 120         pccb->cmd[9] = 0;
 121         pccb->cmdlen = 10;
 122         pccb->msgout[0] = SCSI_IDENTIFY;  /* NOT USED */
 123         debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
 124               __func__,
 125               pccb->cmd[0], pccb->cmd[1],
 126               pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
 127               pccb->cmd[7], pccb->cmd[8]);
 128 }
 129
 130 static void scsi_setup_inquiry(struct scsi_cmd *pccb)
 131 {
 132         pccb->cmd[0] = SCSI_INQUIRY;
 133         pccb->cmd[1] = pccb->lun << 5;
 134         pccb->cmd[2] = 0;
 135         pccb->cmd[3] = 0;
 136         if (pccb->datalen > 255)
 137                 pccb->cmd[4] = 255;
 138         else
 139                 pccb->cmd[4] = (unsigned char)pccb->datalen;
 140         pccb->cmd[5] = 0;
 141         pccb->cmdlen = 6;
 142         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 143 }
 144
 145 #ifdef CONFIG_BLK
 146 static ulong scsi_read(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
 147                        void *buffer)
 148 #else
 149 static ulong scsi_read(struct blk_desc *block_dev, lbaint_t blknr,
 150                        lbaint_t blkcnt, void *buffer)
 151 #endif
 152 {
 153 #ifdef CONFIG_BLK
 154         struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
 155         struct udevice *bdev = dev->parent;
 156 #else
 157         struct udevice *bdev = NULL;
 158 #endif
 159         lbaint_t start, blks;
 160         uintptr_t buf_addr;
 161         unsigned short smallblks = 0;
 162         struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
 163
 164         /* Setup device */
 165         pccb->target = block_dev->target;
 166         pccb->lun = block_dev->lun;
 167         buf_addr = (unsigned long)buffer;
 168         start = blknr;
 169         blks = blkcnt;
 170         debug("\nscsi_read: dev %d startblk " LBAF
 171               ", blccnt " LBAF " buffer %lx\n",
 172               block_dev->devnum, start, blks, (unsigned long)buffer);
 173         do {
 174                 pccb->pdata = (unsigned char *)buf_addr;
 175 #ifdef CONFIG_SYS_64BIT_LBA
 176                 if (start > SCSI_LBA48_READ) {
 177                         unsigned long blocks;
 178                         blocks = min_t(lbaint_t, blks, SCSI_MAX_READ_BLK);
 179                         pccb->datalen = block_dev->blksz * blocks;
 180                         scsi_setup_read16(pccb, start, blocks);
 181                         start += blocks;
 182                         blks -= blocks;
 183                 } else
 184 #endif
 185                 if (blks > SCSI_MAX_READ_BLK) {
 186                         pccb->datalen = block_dev->blksz *
 187                                 SCSI_MAX_READ_BLK;
 188                         smallblks = SCSI_MAX_READ_BLK;
 189                         scsi_setup_read_ext(pccb, start, smallblks);
 190                         start += SCSI_MAX_READ_BLK;
 191                         blks -= SCSI_MAX_READ_BLK;
 192                 } else {
 193                         pccb->datalen = block_dev->blksz * blks;
 194                         smallblks = (unsigned short)blks;
 195                         scsi_setup_read_ext(pccb, start, smallblks);
 196                         start += blks;
 197                         blks = 0;
 198                 }
 199                 debug("scsi_read_ext: startblk " LBAF
 200                       ", blccnt %x buffer %" PRIXPTR "\n",
 201                       start, smallblks, buf_addr);
 202                 if (scsi_exec(bdev, pccb)) {
 203                         scsi_print_error(pccb);
 204                         blkcnt -= blks;
 205                         break;
 206                 }
 207                 buf_addr += pccb->datalen;
 208         } while (blks != 0);
 209         debug("scsi_read_ext: end startblk " LBAF
 210               ", blccnt %x buffer %" PRIXPTR "\n", start, smallblks, buf_addr);
 211         return blkcnt;
 212 }
 213
 214 /*******************************************************************************
 215  * scsi_write
 216  */
 217
 218 /* Almost the maximum amount of the scsi_ext command.. */
 219 #define SCSI_MAX_WRITE_BLK 0xFFFF
 220
 221 #ifdef CONFIG_BLK
 222 static ulong scsi_write(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
 223                         const void *buffer)
 224 #else
 225 static ulong scsi_write(struct blk_desc *block_dev, lbaint_t blknr,
 226                         lbaint_t blkcnt, const void *buffer)
 227 #endif
 228 {
 229 #ifdef CONFIG_BLK
 230         struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
 231         struct udevice *bdev = dev->parent;
 232 #else
 233         struct udevice *bdev = NULL;
 234 #endif
 235         lbaint_t start, blks;
 236         uintptr_t buf_addr;
 237         unsigned short smallblks;
 238         struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
 239
 240         /* Setup device */
 241         pccb->target = block_dev->target;
 242         pccb->lun = block_dev->lun;
 243         buf_addr = (unsigned long)buffer;
 244         start = blknr;
 245         blks = blkcnt;
 246         debug("\n%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n",
 247               __func__, block_dev->devnum, start, blks, (unsigned long)buffer);
 248         do {
 249                 pccb->pdata = (unsigned char *)buf_addr;
 250                 if (blks > SCSI_MAX_WRITE_BLK) {
 251                         pccb->datalen = (block_dev->blksz *
 252                                          SCSI_MAX_WRITE_BLK);
 253                         smallblks = SCSI_MAX_WRITE_BLK;
 254                         scsi_setup_write_ext(pccb, start, smallblks);
 255                         start += SCSI_MAX_WRITE_BLK;
 256                         blks -= SCSI_MAX_WRITE_BLK;
 257                 } else {
 258                         pccb->datalen = block_dev->blksz * blks;
 259                         smallblks = (unsigned short)blks;
 260                         scsi_setup_write_ext(pccb, start, smallblks);
 261                         start += blks;
 262                         blks = 0;
 263                 }
 264                 debug("%s: startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
 265                       __func__, start, smallblks, buf_addr);
 266                 if (scsi_exec(bdev, pccb)) {
 267                         scsi_print_error(pccb);
 268                         blkcnt -= blks;
 269                         break;
 270                 }
 271                 buf_addr += pccb->datalen;
 272         } while (blks != 0);
 273         debug("%s: end startblk " LBAF ", blccnt %x buffer %" PRIXPTR "\n",
 274               __func__, start, smallblks, buf_addr);
 275         return blkcnt;
 276 }
 277
 278 #if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT) && \
 279         !defined(CONFIG_DM_SCSI)
 280 void scsi_init(void)
 281 {
 282         int busdevfunc = -1;
 283         int i;
 284         /*
 285          * Find a device from the list, this driver will support a single
 286          * controller.
 287          */
 288         for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
 289                 /* get PCI Device ID */
 290 #ifdef CONFIG_DM_PCI
 291                 struct udevice *dev;
 292                 int ret;
 293
 294                 ret = dm_pci_find_device(scsi_device_list[i].vendor,
 295                                          scsi_device_list[i].device, 0, &dev);
 296                 if (!ret) {
 297                         busdevfunc = dm_pci_get_bdf(dev);
 298                         break;
 299                 }
 300 #else
 301                 busdevfunc = pci_find_device(scsi_device_list[i].vendor,
 302                                              scsi_device_list[i].device,
 303                                              0);
 304 #endif
 305                 if (busdevfunc != -1)
 306                         break;
 307         }
 308
 309         if (busdevfunc == -1) {
 310                 printf("Error: SCSI Controller(s) ");
 311                 for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
 312                         printf("%04X:%04X ",
 313                                scsi_device_list[i].vendor,
 314                                scsi_device_list[i].device);
 315                 }
 316                 printf("not found\n");
 317                 return;
 318         }
 319 #ifdef DEBUG
 320         else {
 321                 printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",
 322                        scsi_device_list[i].vendor,
 323                        scsi_device_list[i].device,
 324                        (busdevfunc >> 16) & 0xFF,
 325                        (busdevfunc >> 11) & 0x1F,
 326                        (busdevfunc >> 8) & 0x7);
 327         }
 328 #endif
 329         bootstage_start(BOOTSTAGE_ID_ACCUM_SCSI, "ahci");
 330         scsi_low_level_init(busdevfunc);
 331         scsi_scan(true);
 332         bootstage_accum(BOOTSTAGE_ID_ACCUM_SCSI);
 333 }
 334 #endif
 335
 336 /* copy src to dest, skipping leading and trailing blanks
 337  * and null terminate the string
 338  */
 339 static void scsi_ident_cpy(unsigned char *dest, unsigned char *src,
 340                            unsigned int len)
 341 {
 342         int start, end;
 343
 344         start = 0;
 345         while (start < len) {
 346                 if (src[start] != ' ')
 347                         break;
 348                 start++;
 349         }
 350         end = len-1;
 351         while (end > start) {
 352                 if (src[end] != ' ')
 353                         break;
 354                 end--;
 355         }
 356         for (; start <= end; start++)
 357                 *dest ++= src[start];
 358         *dest = '\0';
 359 }
 360
 361 static int scsi_read_capacity(struct udevice *dev, struct scsi_cmd *pccb,
 362                               lbaint_t *capacity, unsigned long *blksz)
 363 {
 364         *capacity = 0;
 365
 366         memset(pccb->cmd, '\0', sizeof(pccb->cmd));
 367         pccb->cmd[0] = SCSI_RD_CAPAC10;
 368         pccb->cmd[1] = pccb->lun << 5;
 369         pccb->cmdlen = 10;
 370         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 371
 372         pccb->datalen = 8;
 373         if (scsi_exec(dev, pccb))
 374                 return 1;
 375
 376         *capacity = ((lbaint_t)pccb->pdata[0] << 24) |
 377                     ((lbaint_t)pccb->pdata[1] << 16) |
 378                     ((lbaint_t)pccb->pdata[2] << 8)  |
 379                     ((lbaint_t)pccb->pdata[3]);
 380
 381         if (*capacity != 0xffffffff) {
 382                 /* Read capacity (10) was sufficient for this drive. */
 383                 *blksz = ((unsigned long)pccb->pdata[4] << 24) |
 384                          ((unsigned long)pccb->pdata[5] << 16) |
 385                          ((unsigned long)pccb->pdata[6] << 8)  |
 386                          ((unsigned long)pccb->pdata[7]);
 387                 return 0;
 388         }
 389
 390         /* Read capacity (10) was insufficient. Use read capacity (16). */
 391         memset(pccb->cmd, '\0', sizeof(pccb->cmd));
 392         pccb->cmd[0] = SCSI_RD_CAPAC16;
 393         pccb->cmd[1] = 0x10;
 394         pccb->cmdlen = 16;
 395         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 396
 397         pccb->datalen = 16;
 398         if (scsi_exec(dev, pccb))
 399                 return 1;
 400
 401         *capacity = ((uint64_t)pccb->pdata[0] << 56) |
 402                     ((uint64_t)pccb->pdata[1] << 48) |
 403                     ((uint64_t)pccb->pdata[2] << 40) |
 404                     ((uint64_t)pccb->pdata[3] << 32) |
 405                     ((uint64_t)pccb->pdata[4] << 24) |
 406                     ((uint64_t)pccb->pdata[5] << 16) |
 407                     ((uint64_t)pccb->pdata[6] << 8)  |
 408                     ((uint64_t)pccb->pdata[7]);
 409
 410         *blksz = ((uint64_t)pccb->pdata[8]  << 56) |
 411                  ((uint64_t)pccb->pdata[9]  << 48) |
 412                  ((uint64_t)pccb->pdata[10] << 40) |
 413                  ((uint64_t)pccb->pdata[11] << 32) |
 414                  ((uint64_t)pccb->pdata[12] << 24) |
 415                  ((uint64_t)pccb->pdata[13] << 16) |
 416                  ((uint64_t)pccb->pdata[14] << 8)  |
 417                  ((uint64_t)pccb->pdata[15]);
 418
 419         return 0;
 420 }
 421
 422
 423 /*
 424  * Some setup (fill-in) routines
 425  */
 426 static void scsi_setup_test_unit_ready(struct scsi_cmd *pccb)
 427 {
 428         pccb->cmd[0] = SCSI_TST_U_RDY;
 429         pccb->cmd[1] = pccb->lun << 5;
 430         pccb->cmd[2] = 0;
 431         pccb->cmd[3] = 0;
 432         pccb->cmd[4] = 0;
 433         pccb->cmd[5] = 0;
 434         pccb->cmdlen = 6;
 435         pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
 436 }
 437
 438 /**
 439  * scsi_init_dev_desc_priv - initialize only SCSI specific blk_desc properties
 440  *
 441  * @dev_desc: Block device description pointer
 442  */
 443 static void scsi_init_dev_desc_priv(struct blk_desc *dev_desc)
 444 {
 445         dev_desc->target = 0xff;
 446         dev_desc->lun = 0xff;
 447         dev_desc->log2blksz =
 448                 LOG2_INVALID(typeof(dev_desc->log2blksz));
 449         dev_desc->type = DEV_TYPE_UNKNOWN;
 450         dev_desc->vendor[0] = 0;
 451         dev_desc->product[0] = 0;
 452         dev_desc->revision[0] = 0;
 453         dev_desc->removable = false;
 454 #if !CONFIG_IS_ENABLED(BLK)
 455         dev_desc->block_read = scsi_read;
 456         dev_desc->block_write = scsi_write;
 457 #endif
 458 }
 459
 460 #if !defined(CONFIG_DM_SCSI)
 461 /**
 462  * scsi_init_dev_desc - initialize all SCSI specific blk_desc properties
 463  *
 464  * @dev_desc: Block device description pointer
 465  * @devnum: Device number
 466  */
 467 static void scsi_init_dev_desc(struct blk_desc *dev_desc, int devnum)
 468 {
 469         dev_desc->lba = 0;
 470         dev_desc->blksz = 0;
 471         dev_desc->if_type = IF_TYPE_SCSI;
 472         dev_desc->devnum = devnum;
 473         dev_desc->part_type = PART_TYPE_UNKNOWN;
 474
 475         scsi_init_dev_desc_priv(dev_desc);
 476 }
 477 #endif
 478
 479 /**
 480  * scsi_detect_dev - Detect scsi device
 481  *
 482  * @target: target id
 483  * @lun: target lun
 484  * @dev_desc: block device description
 485  *
 486  * The scsi_detect_dev detects and fills a dev_desc structure when the device is
 487  * detected.
 488  *
 489  * Return: 0 on success, error value otherwise
 490  */
 491 static int scsi_detect_dev(struct udevice *dev, int target, int lun,
 492                            struct blk_desc *dev_desc)
 493 {
 494         unsigned char perq, modi;
 495         lbaint_t capacity;
 496         unsigned long blksz;
 497         struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb;
 498
 499         pccb->target = target;
 500         pccb->lun = lun;
 501         pccb->pdata = (unsigned char *)&tempbuff;
 502         pccb->datalen = 512;
 503         scsi_setup_inquiry(pccb);
 504         if (scsi_exec(dev, pccb)) {
 505                 if (pccb->contr_stat == SCSI_SEL_TIME_OUT) {
 506                         /*
 507                           * selection timeout => assuming no
 508                           * device present
 509                           */
 510                         debug("Selection timeout ID %d\n",
 511                               pccb->target);
 512                         return -ETIMEDOUT;
 513                 }
 514                 scsi_print_error(pccb);
 515                 return -ENODEV;
 516         }
 517         perq = tempbuff[0];
 518         modi = tempbuff[1];
 519         if ((perq & 0x1f) == 0x1f)
 520                 return -ENODEV; /* skip unknown devices */
 521         if ((modi & 0x80) == 0x80) /* drive is removable */
 522                 dev_desc->removable = true;
 523         /* get info for this device */
 524         scsi_ident_cpy((unsigned char *)dev_desc->vendor,
 525                        &tempbuff[8], 8);
 526         scsi_ident_cpy((unsigned char *)dev_desc->product,
 527                        &tempbuff[16], 16);
 528         scsi_ident_cpy((unsigned char *)dev_desc->revision,
 529                        &tempbuff[32], 4);
 530         dev_desc->target = pccb->target;
 531         dev_desc->lun = pccb->lun;
 532
 533         pccb->datalen = 0;
 534         scsi_setup_test_unit_ready(pccb);
 535         if (scsi_exec(dev, pccb)) {
 536                 if (dev_desc->removable) {
 537                         dev_desc->type = perq;
 538                         goto removable;
 539                 }
 540                 scsi_print_error(pccb);
 541                 return -EINVAL;
 542         }
 543         if (scsi_read_capacity(dev, pccb, &capacity, &blksz)) {
 544                 scsi_print_error(pccb);
 545                 return -EINVAL;
 546         }
 547         dev_desc->lba = capacity;
 548         dev_desc->blksz = blksz;
 549         dev_desc->log2blksz = LOG2(dev_desc->blksz);
 550         dev_desc->type = perq;
 551 removable:
 552         return 0;
 553 }
 554
 555 /*
 556  * (re)-scan the scsi bus and reports scsi device info
 557  * to the user if mode = 1
 558  */
 559 #if defined(CONFIG_DM_SCSI)
 560 static int do_scsi_scan_one(struct udevice *dev, int id, int lun, bool verbose)
 561 {
 562         int ret;
 563         struct udevice *bdev;
 564         struct blk_desc bd;
 565         struct blk_desc *bdesc;
 566         char str[10];
 567
 568         /*
 569          * detect the scsi driver to get information about its geometry (block
 570          * size, number of blocks) and other parameters (ids, type, ...)
 571          */
 572         scsi_init_dev_desc_priv(&bd);
 573         if (scsi_detect_dev(dev, id, lun, &bd))
 574                 return -ENODEV;
 575
 576         /*
 577         * Create only one block device and do detection
 578         * to make sure that there won't be a lot of
 579         * block devices created
 580         */
 581         snprintf(str, sizeof(str), "id%dlun%d", id, lun);
 582         ret = blk_create_devicef(dev, "scsi_blk", str, IF_TYPE_SCSI, -1,
 583                         bd.blksz, bd.blksz * bd.lba, &bdev);
 584         if (ret) {
 585                 debug("Can't create device\n");
 586                 return ret;
 587         }
 588
 589         bdesc = dev_get_uclass_platdata(bdev);
 590         bdesc->target = id;
 591         bdesc->lun = lun;
 592         bdesc->removable = bd.removable;
 593         bdesc->type = bd.type;
 594         memcpy(&bdesc->vendor, &bd.vendor, sizeof(bd.vendor));
 595         memcpy(&bdesc->product, &bd.product, sizeof(bd.product));
 596         memcpy(&bdesc->revision, &bd.revision,  sizeof(bd.revision));
 597         part_init(bdesc);
 598
 599         if (verbose) {
 600                 printf("  Device %d: ", 0);
 601                 dev_print(bdesc);
 602         }
 603         return 0;
 604 }
 605
 606 int scsi_scan_dev(struct udevice *dev, bool verbose)
 607 {
 608         struct scsi_platdata *uc_plat; /* scsi controller platdata */
 609         int ret;
 610         int i;
 611         int lun;
 612
 613         /* probe SCSI controller driver */
 614         ret = device_probe(dev);
 615         if (ret)
 616                 return ret;
 617
 618         /* Get controller platdata */
 619         uc_plat = dev_get_uclass_platdata(dev);
 620
 621         for (i = 0; i < uc_plat->max_id; i++)
 622                 for (lun = 0; lun < uc_plat->max_lun; lun++)
 623                         do_scsi_scan_one(dev, i, lun, verbose);
 624
 625         return 0;
 626 }
 627
 628 int scsi_scan(bool verbose)
 629 {
 630         struct uclass *uc;
 631         struct udevice *dev; /* SCSI controller */
 632         int ret;
 633
 634         if (verbose)
 635                 printf("scanning bus for devices...\n");
 636
 637         blk_unbind_all(IF_TYPE_SCSI);
 638
 639         ret = uclass_get(UCLASS_SCSI, &uc);
 640         if (ret)
 641                 return ret;
 642
 643         uclass_foreach_dev(dev, uc) {
 644                 ret = scsi_scan_dev(dev, verbose);
 645                 if (ret)
 646                         return ret;
 647         }
 648
 649         return 0;
 650 }
 651 #else
 652 int scsi_scan(bool verbose)
 653 {
 654         unsigned char i, lun;
 655         int ret;
 656
 657         if (verbose)
 658                 printf("scanning bus for devices...\n");
 659         for (i = 0; i < CONFIG_SYS_SCSI_MAX_DEVICE; i++)
 660                 scsi_init_dev_desc(&scsi_dev_desc[i], i);
 661
 662         scsi_max_devs = 0;
 663         for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) {
 664                 for (lun = 0; lun < CONFIG_SYS_SCSI_MAX_LUN; lun++) {
 665                         ret = scsi_detect_dev(NULL, i, lun,
 666                                               &scsi_dev_desc[scsi_max_devs]);
 667                         if (ret)
 668                                 continue;
 669                         part_init(&scsi_dev_desc[scsi_max_devs]);
 670
 671                         if (verbose) {
 672                                 printf("  Device %d: ", 0);
 673                                 dev_print(&scsi_dev_desc[scsi_max_devs]);
 674                         }
 675                         scsi_max_devs++;
 676                 } /* next LUN */
 677         }
 678         if (scsi_max_devs > 0)
 679                 scsi_curr_dev = 0;
 680         else
 681                 scsi_curr_dev = -1;
 682
 683         printf("Found %d device(s).\n", scsi_max_devs);
 684 #ifndef CONFIG_SPL_BUILD
 685         setenv_ulong("scsidevs", scsi_max_devs);
 686 #endif
 687         return 0;
 688 }
 689 #endif
 690
 691 #ifdef CONFIG_BLK
 692 static const struct blk_ops scsi_blk_ops = {
 693         .read   = scsi_read,
 694         .write  = scsi_write,
 695 };
 696
 697 U_BOOT_DRIVER(scsi_blk) = {
 698         .name           = "scsi_blk",
 699         .id             = UCLASS_BLK,
 700         .ops            = &scsi_blk_ops,
 701 };
 702 #else
 703 U_BOOT_LEGACY_BLK(scsi) = {
 704         .if_typename    = "scsi",
 705         .if_type        = IF_TYPE_SCSI,
 706         .max_devs       = CONFIG_SYS_SCSI_MAX_DEVICE,
 707         .desc           = scsi_dev_desc,
 708 };
 709 #endif