/*
   * (C) Copyright 2001
   * Denis Peter, MPL AG Switzerland
   *

   * SPDX-License-Identifier:	GPL-2.0+

   */
  
  /*
   * SCSI support.
   */

  #include <common.h>
  #include <command.h>

  #include <asm/processor.h>
  #include <scsi.h>
  #include <image.h>

  #include <pci.h>

  #ifdef CONFIG_SCSI_DEV_LIST
  #define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
  #else

  #ifdef CONFIG_SCSI_SYM53C8XX
  #define SCSI_VEND_ID	0x1000
  #ifndef CONFIG_SCSI_DEV_ID
  #define SCSI_DEV_ID		0x0001
  #else
  #define SCSI_DEV_ID		CONFIG_SCSI_DEV_ID
  #endif

  #elif defined CONFIG_SATA_ULI5288
  
  #define SCSI_VEND_ID 0x10b9
  #define SCSI_DEV_ID  0x5288

  #elif !defined(CONFIG_SCSI_AHCI_PLAT)

  #error no scsi device defined

  #endif

  #define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
  #endif

  #ifdef CONFIG_PCI
  const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
  #endif

  static ccb tempccb;	/* temporary scsi command buffer */
  
  static unsigned char tempbuff[512]; /* temporary data buffer */
  
  static int scsi_max_devs; /* number of highest available scsi device */
  
  static int scsi_curr_dev; /* current device */

  static block_dev_desc_t scsi_dev_desc[CONFIG_SYS_SCSI_MAX_DEVICE];

  
  /********************************************************************************
   *  forward declerations of some Setup Routines
   */
  void scsi_setup_test_unit_ready(ccb * pccb);

  void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks);
  void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks);

  static void scsi_setup_write_ext(ccb *pccb, unsigned long start,
  			  unsigned short blocks);

  void scsi_setup_inquiry(ccb * pccb);
  void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len);

  static int scsi_read_capacity(ccb *pccb, lbaint_t *capacity,
  			      unsigned long *blksz);

  static ulong scsi_read(int device, lbaint_t blknr, lbaint_t blkcnt,
  		       void *buffer);
  static ulong scsi_write(int device, lbaint_t blknr,

  			lbaint_t blkcnt, const void *buffer);

  
  
  /*********************************************************************************
   * (re)-scan the scsi bus and reports scsi device info
   * to the user if mode = 1
   */
  void scsi_scan(int mode)
  {
  	unsigned char i,perq,modi,lun;

  	lbaint_t capacity;
  	unsigned long blksz;

  	ccb* pccb=(ccb *)&tempccb;
  
  	if(mode==1) {
  		printf("scanning bus for devices...
  ");
  	}

  	for(i=0;i<CONFIG_SYS_SCSI_MAX_DEVICE;i++) {

  		scsi_dev_desc[i].target=0xff;
  		scsi_dev_desc[i].lun=0xff;
  		scsi_dev_desc[i].lba=0;
  		scsi_dev_desc[i].blksz=0;

  		scsi_dev_desc[i].log2blksz =
  			LOG2_INVALID(typeof(scsi_dev_desc[i].log2blksz));

  		scsi_dev_desc[i].type=DEV_TYPE_UNKNOWN;
  		scsi_dev_desc[i].vendor[0]=0;
  		scsi_dev_desc[i].product[0]=0;
  		scsi_dev_desc[i].revision[0]=0;

  		scsi_dev_desc[i].removable = false;

  		scsi_dev_desc[i].if_type=IF_TYPE_SCSI;
  		scsi_dev_desc[i].dev=i;
  		scsi_dev_desc[i].part_type=PART_TYPE_UNKNOWN;
  		scsi_dev_desc[i].block_read=scsi_read;

  		scsi_dev_desc[i].block_write = scsi_write;

  	}
  	scsi_max_devs=0;

  	for(i=0;i<CONFIG_SYS_SCSI_MAX_SCSI_ID;i++) {

  		pccb->target=i;

  		for(lun=0;lun<CONFIG_SYS_SCSI_MAX_LUN;lun++) {

  			pccb->lun=lun;
  			pccb->pdata=(unsigned char *)&tempbuff;
  			pccb->datalen=512;
  			scsi_setup_inquiry(pccb);

  			if (scsi_exec(pccb) != true) {

  				if(pccb->contr_stat==SCSI_SEL_TIME_OUT) {

  					debug ("Selection timeout ID %d
  ",pccb->target);

  					continue; /* selection timeout => assuming no device present */
  				}
  				scsi_print_error(pccb);
  				continue;
  			}
  			perq=tempbuff[0];
  			modi=tempbuff[1];
  			if((perq & 0x1f)==0x1f) {
  				continue; /* skip unknown devices */
  			}
  			if((modi&0x80)==0x80) /* drive is removable */

  				scsi_dev_desc[scsi_max_devs].removable=true;

  			/* get info for this device */

  			scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].vendor[0],
  				       &tempbuff[8], 8);
  			scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].product[0],
  				       &tempbuff[16], 16);
  			scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].revision[0],
  				       &tempbuff[32], 4);

  			scsi_dev_desc[scsi_max_devs].target=pccb->target;
  			scsi_dev_desc[scsi_max_devs].lun=pccb->lun;
  
  			pccb->datalen=0;
  			scsi_setup_test_unit_ready(pccb);

  			if (scsi_exec(pccb) != true) {
  				if (scsi_dev_desc[scsi_max_devs].removable == true) {

  					scsi_dev_desc[scsi_max_devs].type=perq;
  					goto removable;
  				}
  				scsi_print_error(pccb);
  				continue;
  			}

  			if (scsi_read_capacity(pccb, &capacity, &blksz)) {

  				scsi_print_error(pccb);
  				continue;
  			}

  			scsi_dev_desc[scsi_max_devs].lba=capacity;
  			scsi_dev_desc[scsi_max_devs].blksz=blksz;

  			scsi_dev_desc[scsi_max_devs].log2blksz =
  				LOG2(scsi_dev_desc[scsi_max_devs].blksz);

  			scsi_dev_desc[scsi_max_devs].type=perq;
  			init_part(&scsi_dev_desc[scsi_max_devs]);
  removable:
  			if(mode==1) {
  				printf ("  Device %d: ", scsi_max_devs);
  				dev_print(&scsi_dev_desc[scsi_max_devs]);
  			} /* if mode */
  			scsi_max_devs++;
  		} /* next LUN */
  	}
  	if(scsi_max_devs>0)
  		scsi_curr_dev=0;
  	else

  		scsi_curr_dev = -1;

  
  	printf("Found %d device(s).
  ", scsi_max_devs);
  	setenv_ulong("scsidevs", scsi_max_devs);
  }
  
  int scsi_get_disk_count(void)
  {
  	return scsi_max_devs;

  }

  #ifdef CONFIG_PCI

  void scsi_init(void)
  {
  	int busdevfunc;

  	int i;
  	/*
  	 * Find a device from the list, this driver will support a single
  	 * controller.
  	 */
  	for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
  		/* get PCI Device ID */
  		busdevfunc = pci_find_device(scsi_device_list[i].vendor,
  					     scsi_device_list[i].device,
  					     0);
  		if (busdevfunc != -1)
  			break;
  	}

  	if (busdevfunc == -1) {
  		printf("Error: SCSI Controller(s) ");
  		for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
  			printf("%04X:%04X ",
  			       scsi_device_list[i].vendor,
  			       scsi_device_list[i].device);
  		}
  		printf("not found
  ");

  		return;
  	}
  #ifdef DEBUG
  	else {

  		printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)
  ",
  		       scsi_device_list[i].vendor,
  		       scsi_device_list[i].device,
  		       (busdevfunc >> 16) & 0xFF,
  		       (busdevfunc >> 11) & 0x1F,
  		       (busdevfunc >> 8) & 0x7);

  	}
  #endif
  	scsi_low_level_init(busdevfunc);
  	scsi_scan(1);
  }

  #endif

  #ifdef CONFIG_PARTITIONS

  block_dev_desc_t * scsi_get_dev(int dev)
  {

  	return (dev < CONFIG_SYS_SCSI_MAX_DEVICE) ? &scsi_dev_desc[dev] : NULL;

  }

  #endif

  /******************************************************************************
   * scsi boot command intepreter. Derived from diskboot
   */

  int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])

  {

  	return common_diskboot(cmdtp, "scsi", argc, argv);

  }
  
  /*********************************************************************************
   * scsi command intepreter
   */

  int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])

  {
  	switch (argc) {

  	case 0:
  	case 1:
  		return CMD_RET_USAGE;

  	case 2:

  			if (strncmp(argv[1],"res",3) == 0) {
  				printf("
  Reset SCSI
  ");
  				scsi_bus_reset();
  				scsi_scan(1);
  				return 0;
  			}
  			if (strncmp(argv[1],"inf",3) == 0) {
  				int i;

  				for (i=0; i<CONFIG_SYS_SCSI_MAX_DEVICE; ++i) {

  					if(scsi_dev_desc[i].type==DEV_TYPE_UNKNOWN)
  						continue; /* list only known devices */
  					printf ("SCSI dev. %d:  ", i);
  					dev_print(&scsi_dev_desc[i]);
  				}
  				return 0;
  			}
  			if (strncmp(argv[1],"dev",3) == 0) {

  				if ((scsi_curr_dev < 0) || (scsi_curr_dev >= CONFIG_SYS_SCSI_MAX_DEVICE)) {

  					printf("
  no SCSI devices available
  ");
  					return 1;
  				}
  				printf ("
      Device %d: ", scsi_curr_dev);
  				dev_print(&scsi_dev_desc[scsi_curr_dev]);
  				return 0;
  			}
  			if (strncmp(argv[1],"scan",4) == 0) {
  				scsi_scan(1);
  				return 0;
  			}
  			if (strncmp(argv[1],"part",4) == 0) {
  				int dev, ok;

  				for (ok=0, dev=0; dev<CONFIG_SYS_SCSI_MAX_DEVICE; ++dev) {

  					if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
  						ok++;
  						if (dev)
  							printf("
  ");

  						debug ("print_part of %x
  ",dev);

  							print_part(&scsi_dev_desc[dev]);
  					}
  				}
  				if (!ok)
  					printf("
  no SCSI devices available
  ");
  				return 1;
  			}

  			return CMD_RET_USAGE;

  	case 3:

  			if (strncmp(argv[1],"dev",3) == 0) {
  				int dev = (int)simple_strtoul(argv[2], NULL, 10);
  				printf ("
  SCSI device %d: ", dev);

  				if (dev >= CONFIG_SYS_SCSI_MAX_DEVICE) {

  					printf("unknown device
  ");
  					return 1;
  				}
  				printf ("
      Device %d: ", dev);
  				dev_print(&scsi_dev_desc[dev]);
  				if(scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
  					return 1;
  				}
  				scsi_curr_dev = dev;
  				printf("... is now current device
  ");
  				return 0;
  			}
  			if (strncmp(argv[1],"part",4) == 0) {
  				int dev = (int)simple_strtoul(argv[2], NULL, 10);
  				if(scsi_dev_desc[dev].type != DEV_TYPE_UNKNOWN) {
  					print_part(&scsi_dev_desc[dev]);
  				}
  				else {
  					printf ("
  SCSI device %d not available
  ", dev);
  				}
  				return 1;
  			}

  			return CMD_RET_USAGE;

      default:
  			/* at least 4 args */
  			if (strcmp(argv[1],"read") == 0) {
  				ulong addr = simple_strtoul(argv[2], NULL, 16);
  				ulong blk  = simple_strtoul(argv[3], NULL, 16);
  				ulong cnt  = simple_strtoul(argv[4], NULL, 16);
  				ulong n;
  				printf ("
  SCSI read: device %d block # %ld, count %ld ... ",
  						scsi_curr_dev, blk, cnt);
  				n = scsi_read(scsi_curr_dev, blk, cnt, (ulong *)addr);
  				printf ("%ld blocks read: %s
  ",n,(n==cnt) ? "OK" : "ERROR");
  				return 0;

  			} else if (strcmp(argv[1], "write") == 0) {
  				ulong addr = simple_strtoul(argv[2], NULL, 16);
  				ulong blk = simple_strtoul(argv[3], NULL, 16);
  				ulong cnt = simple_strtoul(argv[4], NULL, 16);
  				ulong n;
  				printf("
  SCSI write: device %d block # %ld, "
  				       "count %ld ... ",
  				       scsi_curr_dev, blk, cnt);
  				n = scsi_write(scsi_curr_dev, blk, cnt,
  					       (ulong *)addr);
  				printf("%ld blocks written: %s
  ", n,
  				       (n == cnt) ? "OK" : "ERROR");
  				return 0;

  			}
  	} /* switch */

  	return CMD_RET_USAGE;

  }
  
  /****************************************************************************************
   * scsi_read
   */
  
  #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */

  static ulong scsi_read(int device, lbaint_t blknr, lbaint_t blkcnt,
  		       void *buffer)

  {

  	lbaint_t start, blks;
  	uintptr_t buf_addr;

  	unsigned short smallblks;
  	ccb* pccb=(ccb *)&tempccb;
  	device&=0xff;
  	/* Setup  device
  	 */
  	pccb->target=scsi_dev_desc[device].target;
  	pccb->lun=scsi_dev_desc[device].lun;
  	buf_addr=(unsigned long)buffer;
  	start=blknr;
  	blks=blkcnt;

  	debug("
  scsi_read: dev %d startblk " LBAF
  	      ", blccnt " LBAF " buffer %lx
  ",
  	      device, start, blks, (unsigned long)buffer);

  	do {
  		pccb->pdata=(unsigned char *)buf_addr;
  		if(blks>SCSI_MAX_READ_BLK) {
  			pccb->datalen=scsi_dev_desc[device].blksz * SCSI_MAX_READ_BLK;
  			smallblks=SCSI_MAX_READ_BLK;
  			scsi_setup_read_ext(pccb,start,smallblks);
  			start+=SCSI_MAX_READ_BLK;
  			blks-=SCSI_MAX_READ_BLK;
  		}
  		else {
  			pccb->datalen=scsi_dev_desc[device].blksz * blks;
  			smallblks=(unsigned short) blks;
  			scsi_setup_read_ext(pccb,start,smallblks);
  			start+=blks;
  			blks=0;
  		}

  		debug("scsi_read_ext: startblk " LBAF
  		      ", blccnt %x buffer %lx
  ",
  		      start, smallblks, buf_addr);

  		if (scsi_exec(pccb) != true) {

  			scsi_print_error(pccb);
  			blkcnt-=blks;
  			break;
  		}
  		buf_addr+=pccb->datalen;
  	} while(blks!=0);

  	debug("scsi_read_ext: end startblk " LBAF
  	      ", blccnt %x buffer %lx
  ", start, smallblks, buf_addr);

  	return(blkcnt);
  }

  /*******************************************************************************
   * scsi_write
   */
  
  /* Almost the maximum amount of the scsi_ext command.. */
  #define SCSI_MAX_WRITE_BLK 0xFFFF

  static ulong scsi_write(int device, lbaint_t blknr,

  			lbaint_t blkcnt, const void *buffer)
  {
  	lbaint_t start, blks;
  	uintptr_t buf_addr;
  	unsigned short smallblks;
  	ccb* pccb = (ccb *)&tempccb;
  	device &= 0xff;
  	/* Setup  device
  	 */
  	pccb->target = scsi_dev_desc[device].target;
  	pccb->lun = scsi_dev_desc[device].lun;
  	buf_addr = (unsigned long)buffer;
  	start = blknr;
  	blks = blkcnt;
  	debug("
  %s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx
  ",
  	      __func__, device, start, blks, (unsigned long)buffer);
  	do {
  		pccb->pdata = (unsigned char *)buf_addr;
  		if (blks > SCSI_MAX_WRITE_BLK) {
  			pccb->datalen = (scsi_dev_desc[device].blksz *
  					 SCSI_MAX_WRITE_BLK);
  			smallblks = SCSI_MAX_WRITE_BLK;
  			scsi_setup_write_ext(pccb, start, smallblks);
  			start += SCSI_MAX_WRITE_BLK;
  			blks -= SCSI_MAX_WRITE_BLK;
  		} else {
  			pccb->datalen = scsi_dev_desc[device].blksz * blks;
  			smallblks = (unsigned short)blks;
  			scsi_setup_write_ext(pccb, start, smallblks);
  			start += blks;
  			blks = 0;
  		}
  		debug("%s: startblk " LBAF ", blccnt %x buffer %lx
  ",
  		      __func__, start, smallblks, buf_addr);

  		if (scsi_exec(pccb) != true) {

  			scsi_print_error(pccb);
  			blkcnt -= blks;
  			break;
  		}
  		buf_addr += pccb->datalen;
  	} while (blks != 0);
  	debug("%s: end startblk " LBAF ", blccnt %x buffer %lx
  ",
  	      __func__, start, smallblks, buf_addr);
  	return blkcnt;
  }

  /* copy src to dest, skipping leading and trailing blanks
   * and null terminate the string
   */
  void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len)
  {
  	int start,end;
  
  	start=0;
  	while(start<len) {
  		if(src[start]!=' ')
  			break;
  		start++;
  	}
  	end=len-1;
  	while(end>start) {
  		if(src[end]!=' ')
  			break;
  		end--;
  	}
  	for( ; start<=end; start++) {
  		*dest++=src[start];
  	}
  	*dest='\0';
  }

  /* Trim trailing blanks, and NUL-terminate string
   */
  void scsi_trim_trail (unsigned char *str, unsigned int len)
  {
  	unsigned char *p = str + len - 1;
  
  	while (len-- > 0) {
  		*p-- = '\0';
  		if (*p != ' ') {
  			return;
  		}
  	}
  }

  int scsi_read_capacity(ccb *pccb, lbaint_t *capacity, unsigned long *blksz)
  {
  	*capacity = 0;
  
  	memset(pccb->cmd, 0, sizeof(pccb->cmd));
  	pccb->cmd[0] = SCSI_RD_CAPAC10;
  	pccb->cmd[1] = pccb->lun << 5;
  	pccb->cmdlen = 10;
  	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
  
  	pccb->datalen = 8;

  	if (scsi_exec(pccb) != true)

  		return 1;
  
  	*capacity = ((lbaint_t)pccb->pdata[0] << 24) |
  		    ((lbaint_t)pccb->pdata[1] << 16) |
  		    ((lbaint_t)pccb->pdata[2] << 8)  |
  		    ((lbaint_t)pccb->pdata[3]);
  
  	if (*capacity != 0xffffffff) {
  		/* Read capacity (10) was sufficient for this drive. */
  		*blksz = ((unsigned long)pccb->pdata[4] << 24) |
  			 ((unsigned long)pccb->pdata[5] << 16) |
  			 ((unsigned long)pccb->pdata[6] << 8)  |
  			 ((unsigned long)pccb->pdata[7]);
  		return 0;
  	}
  
  	/* Read capacity (10) was insufficient. Use read capacity (16). */
  
  	memset(pccb->cmd, 0, sizeof(pccb->cmd));
  	pccb->cmd[0] = SCSI_RD_CAPAC16;
  	pccb->cmd[1] = 0x10;
  	pccb->cmdlen = 16;
  	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
  
  	pccb->datalen = 16;

  	if (scsi_exec(pccb) != true)

  		return 1;
  
  	*capacity = ((uint64_t)pccb->pdata[0] << 56) |
  		    ((uint64_t)pccb->pdata[1] << 48) |
  		    ((uint64_t)pccb->pdata[2] << 40) |
  		    ((uint64_t)pccb->pdata[3] << 32) |
  		    ((uint64_t)pccb->pdata[4] << 24) |
  		    ((uint64_t)pccb->pdata[5] << 16) |
  		    ((uint64_t)pccb->pdata[6] << 8)  |
  		    ((uint64_t)pccb->pdata[7]);
  
  	*blksz = ((uint64_t)pccb->pdata[8]  << 56) |
  		 ((uint64_t)pccb->pdata[9]  << 48) |
  		 ((uint64_t)pccb->pdata[10] << 40) |
  		 ((uint64_t)pccb->pdata[11] << 32) |
  		 ((uint64_t)pccb->pdata[12] << 24) |
  		 ((uint64_t)pccb->pdata[13] << 16) |
  		 ((uint64_t)pccb->pdata[14] << 8)  |
  		 ((uint64_t)pccb->pdata[15]);
  
  	return 0;
  }

  
  /************************************************************************************
   * Some setup (fill-in) routines
   */
  void scsi_setup_test_unit_ready(ccb * pccb)
  {
  	pccb->cmd[0]=SCSI_TST_U_RDY;
  	pccb->cmd[1]=pccb->lun<<5;
  	pccb->cmd[2]=0;
  	pccb->cmd[3]=0;
  	pccb->cmd[4]=0;
  	pccb->cmd[5]=0;
  	pccb->cmdlen=6;
  	pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
  }

  void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks)
  {
  	pccb->cmd[0]=SCSI_READ10;
  	pccb->cmd[1]=pccb->lun<<5;
  	pccb->cmd[2]=((unsigned char) (start>>24))&0xff;
  	pccb->cmd[3]=((unsigned char) (start>>16))&0xff;
  	pccb->cmd[4]=((unsigned char) (start>>8))&0xff;
  	pccb->cmd[5]=((unsigned char) (start))&0xff;
  	pccb->cmd[6]=0;
  	pccb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
  	pccb->cmd[8]=(unsigned char) blocks & 0xff;
  	pccb->cmd[6]=0;
  	pccb->cmdlen=10;
  	pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */

  	debug ("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X
  ",

  		pccb->cmd[0],pccb->cmd[1],
  		pccb->cmd[2],pccb->cmd[3],pccb->cmd[4],pccb->cmd[5],
  		pccb->cmd[7],pccb->cmd[8]);
  }

  void scsi_setup_write_ext(ccb *pccb, unsigned long start, unsigned short blocks)
  {
  	pccb->cmd[0] = SCSI_WRITE10;
  	pccb->cmd[1] = pccb->lun << 5;
  	pccb->cmd[2] = ((unsigned char) (start>>24)) & 0xff;
  	pccb->cmd[3] = ((unsigned char) (start>>16)) & 0xff;
  	pccb->cmd[4] = ((unsigned char) (start>>8)) & 0xff;
  	pccb->cmd[5] = ((unsigned char) (start)) & 0xff;
  	pccb->cmd[6] = 0;
  	pccb->cmd[7] = ((unsigned char) (blocks>>8)) & 0xff;
  	pccb->cmd[8] = (unsigned char)blocks & 0xff;
  	pccb->cmd[9] = 0;
  	pccb->cmdlen = 10;
  	pccb->msgout[0] = SCSI_IDENTIFY;  /* NOT USED */
  	debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X
  ",
  	      __func__,
  	      pccb->cmd[0], pccb->cmd[1],
  	      pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
  	      pccb->cmd[7], pccb->cmd[8]);
  }

  void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks)
  {
  	pccb->cmd[0]=SCSI_READ6;
  	pccb->cmd[1]=pccb->lun<<5 | (((unsigned char)(start>>16))&0x1f);
  	pccb->cmd[2]=((unsigned char) (start>>8))&0xff;
  	pccb->cmd[3]=((unsigned char) (start))&0xff;
  	pccb->cmd[4]=(unsigned char) blocks & 0xff;
  	pccb->cmd[5]=0;
  	pccb->cmdlen=6;
  	pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */

  	debug ("scsi_setup_read6: cmd: %02X %02X startblk %02X%02X blccnt %02X
  ",

  		pccb->cmd[0],pccb->cmd[1],
  		pccb->cmd[2],pccb->cmd[3],pccb->cmd[4]);
  }
  
  
  void scsi_setup_inquiry(ccb * pccb)
  {
  	pccb->cmd[0]=SCSI_INQUIRY;
  	pccb->cmd[1]=pccb->lun<<5;
  	pccb->cmd[2]=0;
  	pccb->cmd[3]=0;
  	if(pccb->datalen>255)
  		pccb->cmd[4]=255;
  	else
  		pccb->cmd[4]=(unsigned char)pccb->datalen;
  	pccb->cmd[5]=0;
  	pccb->cmdlen=6;
  	pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
  }

  
  U_BOOT_CMD(
  	scsi, 5, 1, do_scsi,

  	"SCSI sub-system",

  	"reset - reset SCSI controller
  "
  	"scsi info  - show available SCSI devices
  "
  	"scsi scan  - (re-)scan SCSI bus
  "
  	"scsi device [dev] - show or set current device
  "
  	"scsi part [dev] - print partition table of one or all SCSI devices
  "
  	"scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'
  "

  	"     to memory address `addr'
  "
  	"scsi write addr blk# cnt - write `cnt' blocks starting at block
  "
  	"     `blk#' from memory address `addr'"

  );
  
  U_BOOT_CMD(
  	scsiboot, 3, 1, do_scsiboot,

  	"boot from SCSI device",

  	"loadAddr dev:part"

  );